The expression that best represents the cost of shirts plus shipping is 20b + 5.
What is the expression that represents the cost of shirts plus shipping?An expression is a statement that is made up of at least two numbers or variables and at least one mathematical operation. An expression usually does not have an equal to sign.
The first step is to determine the cost of a shirt and the cost of shipping.
a + b = 25 equation 1
a + 2b = 45 equation 2
Where:
a = cost of shipping
Subtract equation 1 from equation 2
b = 20
a = 25 - 20
a = 5
Thus, the cost of one shirt is 20. The cost of shipping is 5. The cost of shirts increases with the number of shirts bought while the cost of shipping remains constant.
The expression is: 20b + 5
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Help please I’m struggling
A 3000Lb Car traveling uphill has a grade resistance of -110 pounds. Use a tangent function to estimate the angle of the grade. Give your answer to the nearest tenth of a degree.
The required grade resistance of car to the uphill movement is -2.9 degrees.
A 3000Lb Car traveling uphill has a grade resistance of -110 pounds. with the help of a tangent function to estimate the angle of the grade.
What are trigonometric equations?These are the equation that contains trigonometric operators such as sin, cos.. etc.. In algebraic operation.
Here,
Weight of car = 3000 Lb
grade of resistance = -110
Now,
Angle of the grade = tan⁻¹(-110 / 3000)
The angle of the grade = tan⁻¹(-0.05)
The angle of the grade = -2.9
Thus, the required grade resistance of the car to the uphill movement is -2.9 degrees.
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Mandy has taken R140 to the supermarket. Mandy want to buy 4 packets of 1kg chicken .verify with calculations if this will be possible
Based on the cost of 1kg packets of chicken, it will not be possible for Mandy to buy 4 packets of 1 kg chicken.
How much chicken can be bought?The cost of a single packet of 1kg chicken is R40.
This means that the cost of 4 packets of 1kg chicken is:
= 40 x 4
= R160
Mandy only has R140 which means that Mandy won't have enough to buy 4 packets of chicken. The amount remaining would be:
= 160 - 140
= R20
In conclusion, it will not be possible for Mandy to buy the chicken packets.
Missing part of question:
The cost of 1kg packets of chicken is R40 per packet.
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Two friends drive off in different directions from the same place. One heads North at 45 miles per hour, while the other heads East at 35 miles per hour.
Complete an equation for the distance between the friends after t hours. Hint: Assume the starting point is the origin.
Distance =
The equation that represents the distance, d, between the friends after t hours is d = √(3250t²)
Calculating distance
From the question, we are to write an equation for the distance between the friends after t hours
From the given information,
"One heads North at 45 miles per hour, while the other heads East at 35 miles per hour"
First, we will calculate the distance each of them has traveled after t hours
Using the formula,
Distance = Speed × Time
Distance covered by the friend that heads North is
Distance = 45 × t
Distance = 45t
Distance covered by the friend that heads East is
Distance = 35 × t
Distance = 35t
Now, for the distance, d, between the two friends after t hours
Using the Pythagorean theorem, we can write that
d² = (45t)² + (35t)²
d² = 2025t² + 1225t²
d² = 3250t²
d = √(3250t²)
Hence, the equation that represents the distance, d, between the friends after t hours is d = √(3250t²)
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What goes into the table?
The y values or the range of the function are as follows;
x = 4 ; y = 5x = 6 ; y = 6x = 9; y = 7.5x = 11 ; y = 8.5How to find the range of a function when given the domain?The function is expressed as follows;
y = 1 / 2 x + 3
The domain of a function is the input of a function. They are the independent value of a function
Therefore, the domain of the function is as follows;
46911Therefore, the range, which is the y values or the output can be found as follows;
when x = 4
y = 1 / 2(4) + 3
y = 5
when x = 6
y = 1 / 2(6) + 3
y = 6
when x = 9
y = 1 / 2(9) + 3
y = 7.5
when x = 11
y = 1 / 2(11) + 3
y = 8.5
Hence, the y values or the range of the function are as follows;
x = 4 ; y = 5x = 6 ; y = 6x = 9; y = 7.5x = 11 ; y = 8.5learn more on domain and range of a function here: https://brainly.com/question/28135761
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Abigail buys eggs and oranges at the store.
• She pays a total of $14.71.
• She pays a total of $4.48 for the eggs.
• She buys 3 bags of oranges that each cost the same amount.
Write and solve an equation which can be used to determine x, how much each bag
of oranges costs.
that's, she pays $4.48 for eggs.. that simple means that orange is also the same amount of the egg,,,
$4.48×3=$13.44
i.e X=$13.44
Everyone is order some new supplies for the restaurant where he works the restaurant needs at least 587 knives there are currently 387 nice if it set on cell contains 20 knives
According to the inequality, the number of the cells of the knives the need is a 10 cells.
According to the statement
We have to find that the inequality for the knives which are need to buy.
So, For this purpose, we know that the
Inequality is a statement of an order relationship—greater than, greater than or equal to, less than, or less than or equal to—between two numbers or algebraic expressions.
From the given information:
Everyone is order some new supplies for the restaurant where he works the restaurant needs at least 587 knives there are currently 387 nice if it set on cell contains 20 knives
Then
Number of the knives they need = 587 knives
Number of the knives present = 387
Number of the knives they need = 587 - 387
Number of the knives they need = 200
Then
The cell contains knives = 20 knives
Then
The number of the cells they need = 200/20
The number of the cells they need = 10 cells.
If s is the number of the cells of the knife needs then inequality become
s > 10.
So, According to the inequality, the number of the cells of the knives the need is a 10 cells.
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PLEASE SHOW YOUR WORK AND PLEASE HELP ME ON THIS QUESTION THANK YOU.
Mrs. Steinberg had 3.23 pounds of ground beef to make 0.5 lb hamburgers. Which two expressions shows how to correctly solve for the number of hamburgers Mrs. Steinberg could make?
Suppose you go shopping for a new futon bed for your room. The model you really like happens to be on sale for $250. It's original price is $500. What percent of the original price will you save if you purchase it?
Round your percentage to one decimal place.
Do not include
%
sign with your answer.
Answer:
Step-by-step explanation:
500-250= 250
there for its half off 50% because its split down the middle, so thats an easy one
An investment of $34,000 was made by a business club. The investment was split into three parts and lasted for one year. The first part of the investment earned 8% interest, the second 6%, and the third
9%. Total interest from the investments was $2700. The interest from the first investment was 4 times the interest from the second. Find the amounts of the three parts of the investment.
The amounts of the three parts of the investment are $6000, $10000, and $18000.
How to calculate the values?The total amount invested = $34000
We know that the amount was split into three parts, let the parts be x, y, z
then, x + y + z = 34000 //Equation 1
interest of any part after a year = the amount of the part times it's interest
interest of first part after a year = x* 0.08 // 8% = 8 / 100 = 0.08
interest of second part after a year = y * 0.06
interest of third part after a year = z * 0.09
we know that the total interest earned by the total investment = $2700
i.e, 0.08x + 0.06y + 0.09z = 2700 // Equation 2
Guven that interest from the first investment was 4 times the interest from the second.
i.e, 0.08x = 4 * 0.06y
= x = 3y // substituting this relation in the above eauations
x + y + z = 34000 //Equation 1
3y + y + z = 34000
= 4y + z = 34000 //Equation 3
0.08x + 0.06y + 0.09z = 2700 // Equation 2
= 0.08(3y) + 0.06y + 0.09z = 2700
=0.3y + 0.09z = 2700 // simplyfying the equation by multiplying with 100
= 30y + 9z = 270000 // Equation 4
Solving 3 and 4 equations;
36y + 9z = 306000 //Equation 3 multiplied by 9 to make it simple to solve with equation 4
30y + 9z = 270000
6y = 36000
y = 36000 / 6 = 6000// second part of the investment
x = 3y = 3 * 6000 = 18000 // first part of the investment
z = 34000 - (x + y) // from equation 1
z = 34000 - 24000 = 10000 // third part of the investment.
Therefore, the amounts of the three parts of the investment are $6000, $10000, and $18000.
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A textbook cover has a length of 11 in. and a width of x in. Using the formula A = 1 x w, which expression represents the area of the textbook cover?
A 11x
B x +11
C x/11
D x = 11
Answer: A
Step by step explanation:
4/N = 4/5 a. N=5 B. N=5/16 c. N=3 1/5 d. N=50 please select the best answer from the choices provided
Answer:
The answer A) n=5
Step-by-step explanation:
Find the least common multiple.
The left denominator is "N"
The right denominator is "5"
That's how you get the answer N=5
Answer:
Answer a. n=5
Step-by-step explanation:
it really be the answer
A small store sells spearmint tea at $3.15 an ounce and peppermint tea at $5.01 per ounce. The store owner decides to make a batch of 93 ounces of tea that mixes both kinds and sell the mixture for $3.80 an ounce. How many ounces of the two varieties of tea should be mixed to obtain the same revenue as selling them unmixed?
The no. of ounce of spearmint tea is = 60.50 ounce
the no. of ounce of peppermint tea is = 32.49 ounce
We have been given that -
Cost of spearmint tea = $3.15
Cost of peppermint tea = $5.01
Cost of the mixture = $3.80
solution-
Let the quantity of spearmint tea = x ounce
and the quantity of peppermint tea = y ounce
1 ounce quantity contains spearmint tea and peppermint tea =
(x+y=1) ......eq (1)
the cost
($3.15)x +($5.01)y = $3.80
3.15x + 5.01y = 3.80......... eq(2)
multiply equation (1) with 3.15.
∴ 3.15x +3.15y =3.15
using alligation..
Alligation: It is the rule that enables us to find the ratio in which two or more ingredients at the given price must be mixed to produce a mixture of the desired price.
substract equation (1) and equation (2)
(3.15x + 5.01y = 3.80) -(3.15x +3.15y =3.15)
After solve the equations we get
1.86y = o.65
y = 0.65/1.86
y = 0.349462... per ounce
put the value of y in equation (1)
x +y= 1
x = 1-y
x = 1-0.349462
x = 0.650538 per ounce
So the quantity of spearmint tea = 93 ×x per ounce
93 ×0.650538
60.50 ounce
and the quantity of peppermint tea = 93×y per ounce
93× 0.349462
32.49 ounce
hence, the no. of ounce of spearmint tea is = 60.50 ounce
the no. of ounce of peppermint tea is = 32.49 ounce
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Put the following in order from smallest to greatest 1/2 0.32 and 6%
Answer: 6%, .32, 1/2
Step-by-step explanation:
if you put all of them into decimals, you get
1/2=.50
.32=.32
6%=.06
C. How do i solve the inequality involving absolute value for |x +9| ≥ −6?
Answer:
The values of x for the inequality |x +9| ≥ −6 are x = -3, -15.
Step-by-step explanation:
An equation of inequality is given that is |x +9| ≥ −6 that is to be solved for x.
Firstly let us understand what is an inequality;
In mathematics, inequalities specify the connection between two non-equal numbers. To be unequal is to be unequal.
Now, let us consider the given inequality;
=> |x +9| ≥ −6
Let us take this equation this way to solve which is the negative value of terms of the bar;
=> -(x + 9) = −6
=> -x = -6 + 9
=> x = -3
Now, Let us take this equation this way to solve which is the positive value of terms of the bar;
=> x + 9 = −6
=> x = -6 - 9
=> x = -15
Therefore, the values of x for the inequality |x +9| ≥ −6 are x = -3, -15.
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Find the area of each sector. Round your answers to the nearest tenth.
*
The area of the sector is 88.4 in² to the nearest tenth
Calculating Area of a sectorFrom the question, we are to calculate the area of the sector in the given circle
Area of a circle is given by the formula,
A = θ/360° × πr²
Where θ is the angle subtended
and r is the radius
From the given diagram,
θ = 45°
r = 15 in
Thus,
Area of the sector = 45°/360° × π × 15²
Area of the sector = 1/8 × π × 225
Area of the sector = 28.125π
Area of the sector = 88.4 in²
Hence, the area of the sector is 88.4 in² to the nearest tenth
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what is the standard deviation of data set
20 20 28 62 68 71 77 85 95 99
Answer:
28.30282671
Step-by-step explanation:
Step 1: Find the mean.
Step 2: For each data point, find the square of its distance to the mean.
Step 3: Sum the values from Step 2.
Step 4: Divide by the number of data points.
Step 5: Take the square root.
6. Joe is 3 years older than Paula, and
Paula is 2 years younger than Sue. Il Sue
is 20, how old is Joe?
(1) 18
(2) 21
(3) 23
(4) 25
(5) Not enough information is given.
Answer:
(2) 21 years old
Step-by-step explanation:
12 buckets of water needed to fill a small swimming pool they are approximately 3.8 in 1 gallon if each bucket holds 1.5 gallons what is the volume of water in liters the pool holds
The volume of water in liters the pool holds is 68.4 liters.
Given, we know that 12 buckets of water is needed to fill the swimming pool.
Pool surface area is calculated by multiplying length by breadth. The volume in cubic meters is calculated by multiplying that by the average depth. Due to the fact that there are 7.5 gallons in every cubic foot, you can convert your results to gallons to get the pool volume.
one bucket holds 1.5 gallons .
There are approximately 3.8 liters in 1 gallon.
Therefore, the volume of the swimming pool = ?
12 buckets holding how many gallons of water = each bucket containing 1.5 gallons × total number of buckets
= 1.5 × 12
= 18
Therefore, total volume of water in the swimming pool = total gallons of water × liters in one gallon
= 18 × 3.8
= 68.4 liters
Hence we get the total volume of the swimming pool as 68.4 liters.
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please help me please
Based on the mapping diagram shown, the function f(g(13)) is equal to 32.
What is a function?A function can be defined as a mathematical expression which is used to define and represent the relationship that exists between two or more variables. This ultimately implies that, a function is typically used for mapping an input variable to an output variable.
The types of function.In Mathematics, there are different types of function and these include the following;
Periodic functionSignum functionPiece-wise defined function.Logarithm functionModulus functionInverse functionFrom the mapping diagram shown, g(13) is equal to 16 and f(g(13)) ⇒ f(16) would be equal to 32.
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cuantos minutos son 1/4 de hora
solucion
Answer:
Por lo tanto, un cuarto de hora es igual a 15 minutos.
1/4 de hora = (1/4)*(1 hora) = (1/4)*(60 minutos) = 15 minutos
Class A has 14 pupils and class B has 26 pupils.
Both classes sit the same maths test.
The mean score for class A is 73.
The mean score for both classes is 32.
What is the mean score (rounded to 2 DP) in the maths test for class B?
Answer:
9.92
Step-by-step explanation:
Hope this help you!!
A rock is thrown upward with a velocity of 12 meters per second from the top of a 50 meter high cliff, and it misses the cliff on the way back down. When will the rock
be 3 meters from ground level? Round your answer to two decimal places.
Hence , the rock will be 3 meters from ground level in 4.55 seconds.
The quadratic formula may be a known formula that enables you to unravel any style of equation. A equation may be a second degree polynomial, which suggests that its highest exponent is a pair of two.The quadratic formula is given by x = (-b ±√(b² - 4ac)) / (2a)It is given that rock is thrown upward with a velocity of 12 meters per second from the top of a 50 meter high cliff, and it misses the cliff on the way back down.
Using newton's equation s = ut + 1 /2 at² + s₀
where v₀ is velocity and s₀ is the height above ground when thrown, then we have
Putting u = 12 , a = -g = - 9.8 m/s² , s = 3 , s₀ = 50
3 = 12t + 1 / 2 (-9.8)t² + 50
0 = 12t - 4.9t²+ 47
4.9t² -12t - 47 = 0
Putting a = 4.9 , b = -12 , c = -47 in quadratic formula , we get
t = -(-12) ± √(-12)²-4(4.9)(-47) / 2(4.9)
= 12 ± √144 + 921.2 /9.8
= 12 ± √1065.2 /9.8
= 12 ± 32.63/9.8
= 44.63/9.8
= 4.55 s
We will consider only positive value as time cannot be in negative
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Does this shape belong in a group of shapes that have more than one
perpendicular sides?
Use the drop-down menus to explain your answer.
Yes this shape belong in a group of shapes having more than one perpendicular sides.
As listed before, the most common shapes with perpendicular sides are squares and rectangles. Another common shape with perpendicular sides is the right triangle. It is called a right triangle because it has a right angle for one of its three angles, this is where the perpendicular sides meet.
Perpendicular is a very common term used in geometry. It helps to define shapes, understand angles, and calculate missing angles. Perpendicular means two lines, or sides, that meet at a right angle. A right angle is the measurement of 90 degrees. Perpendicular sides are very common in real-life situations like houses and storage. Any box, with rectangles on each side, has perpendicular sides. Most houses have perpendicular walls because they meet at a right angle with each other. Let's discover how important perpendicular sides are in everyday life.
Perpendicular sides are at a 90-degree angle. Since they are so common, there is a special symbol to signify the sides are perpendicular without measuring. This looks like a box in the corner angle. Any angle with this box symbol is exactly 90 degrees, not a degree more or less. Below is an image that shows a rectangle that has four perpendicular sides, labeled with the boxes in each corner, signifying that each angle is a right angle or 90 degrees.
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I WOULD APPRECIATE IT IF SOMEONE HELPED ME UNDERSTAND ADDITION AND SCALAR MULTIPLICATION OF MATRICES ALONG WITH THE ANSWER TO THIS THANK YOU
Step-by-step explanation:
scalar multiplication is simply done by multiplying every term of the matrix by the factor.
-1/5 A =
-5×-1/5 -15×-1/5 10×-1/5
-30×-1/5 20×-1/5 -25×-1/5
=
1 3 -2
6 -4 5
for the addition of 2 matrices imagine that each one is on a transparent slide, and you simply move both slides on top of each other, and you add all numbers for a position, that overlap each other for that position.
so,
-1/5 × A + B =
1+4 3+5 -2+ -7
6+7 -4+0 5+ -5
=
5 8 -9
13 -4 0
annex zeros if needed to write remainders as decimals 5.3 ÷ 0.2
Answer:
26.5
Step-by-step explanation:
Bertie placed a transparent grid made up of unit squares over each of the shapes she was measuring below. Using her grid, approximate the area of each region.
The area covered by region 1 is 16 units and that by region 2 is 15 units.
Given the area of a square be 1unit.
So. the number of block completely covered = a
number of block that are coverered approximately half = b .
So, total area covered = 1*a + 0.5 * b
for figure 1.)
the number of block completely covered = a = 12
number of block that are coverered approximately half = b = 8.
Therefore Total area covered = 1*a + 0.5 * b
= 1*12 + 0.5 * 8
= 12 + 4
= 16units
for figure 2.)
the number of block completely covered = a = 12
number of block that are coverered approximately half = b = 6.
Therefore Total area covered = 1*a + 0.5 * b
= 1*12 + 0.5 * 6
= 12 + 3
= 15units
Therefore, the area covered in region 1 is 16 unit and the area covered in region 2 is 15 unit.
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The area covered by region 1 is 16 units and that by region 2 is 15 units.
Given the area of a square be 1unit.
So. the number of block completely covered = a
number of block that are coverered approximately half = b .
So, total area covered = 1*a + 0.5 * b
for figure 1.)
the number of block completely covered = a = 12
number of block that are coverered approximately half = b = 8.
Therefore Total area covered = 1*a + 0.5 * b
= 1*12 + 0.5 * 8
= 12 + 4
= 16units
for figure 2.)
the number of block completely covered = a = 12
number of block that are coverered approximately half = b = 6.
Therefore Total area covered = 1*a + 0.5 * b
= 1*12 + 0.5 * 6
= 12 + 3
= 15units
Therefore, the area covered in region 1 is 16 unit and the area covered in region 2 is 15 unit.
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Simplify: 5/6-7/2-5/3 A.-19/22 B.-17/12 C.1/4 D.23/12
The simplified value of the expression 5/6 - 7/2 - 5/3 is -13/3
What are expressions?Expressions are mathematical statements that are represented by variables, coefficients and operators
How to determine the solution of the expression?The expression is given as
5/6-7/2-5/3
Convert the mixed fractions to improper fractions
So, we have
5/6 - 7/2 - 5/3
Evaluate the product of the numerators and the denominators in the above expression so that the denominators are the same
So, we have
5/6 - 7/2 - 5/3 = 5/6 - 21/6 - 10/6
Take the LCM of the denominators in the above expression
So, we have
5/6 - 7/2 - 5/3 = (5 - 21 - 10)/6
Evaluate the difference of the numerators in the above expression
So, we have
5/6 - 7/2 - 5/3 = -26/6
Simplify the above fraction
So, we have
5/6 - 7/2 - 5/3 = -13/3
Hence, the simplified value of the expression 5/6 - 7/2 - 5/3 is -13/3
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A shipping box has to have specific dimensions to hold an item. The volume must be 10240 cubic inches. The height must be `1/5` of the length and `1/4` of the the width. Give the dimensions of the box below. Give your answers as whole numbers or decimals rounded to 1 decimal place.
The dimensions of the box is a height of 8 inches, width of 32 inches and length of 40 inches.
What is an equation?An equation is an expression that shows the relationship between two or more numbers and variables.
Let h represent the height of the shipping box. Hence:
h = (1/5) * length
Length = 5h
h = (1/4) * width
Width = 4h
Volume of the box = height * width * length = h * 5h * 4h
Width = 4h
h = 8 in
Length = 5(8) = 40 in
Width = 4(8) = 32 in
The dimensions of the box is a height of 8 inches, width of 32 inches and length of 40 inches.
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Shelby is a certified medical assistant at a local hospital. She is responsible for monitoring the
amount of medicine in a patient's blood every hour. She takes the patient's blood and measures
150 mg of medicine 2 hours after it was administered. Later she measures 60 mg of medicine
14 hours after it was administered. Write an equation that models this situation. How many
hours would it take for the medicine to be completely out of the patient's system?
Answer: 22.8571428571 hours
Step-by-step explanation: