In a proportional relationship when x=6 we know that y=14
Answer:
Given that y varies proportionally with x , with a constant of proportionality k=13 , find y when x=12 .
Write the equation of the proportional relationship.
The variable x varies proportionally with y with a constant of proportionality equal to 13
So,
Substitute the given x value.
Step-by-step explanation:
The use of electricity in the US in 1902 was 6.03 x 10^9 kilowatt-hours.
The use of electricity in the US in 1950 was 4.3 x 10^11 kilowatt-hours.
How many times more was the electricity used in 1950 than 1902? Express your answer in Scientific Notation.
a. 7.131 x 10
b. 10.33 x 10^20
c. 1.73 x 10^2
d. 2.6 x 10^20
Using scientific notation , the electricity used in 1950 was 7.131 × 10¹ times more than that used in 1902 .
Values that are either too huge or too little to be conveniently expressed in decimal form can be expressed using scientific notation (typically would result in a long string of digits). It is also referred to as scientific form, standard index form, and standard form in the UK. This base ten notation is often used by scientists, mathematicians, and engineers because it can make various mathematical procedures easier.
One can represent exceedingly large or extremely small quantities using scientific notation. In scientific notation, the result of multiplying an integer between 1 and 10 by a power of 10 is written. For instance, in scientific notation, 35,000,000 can be written as 3.5× 10⁷.
Given that the use of electricity in the US in 1902 was 6.03 x 10⁹kilowatt-hours and the use of electricity in the US in 1950 was 4.3 x 10¹¹ kilowatt-hours.
These are both represented in scientific notation.
Now we have to divide to find the number of times more electricity is used.
(4.3 x 10¹¹) ÷ (6.03 x 10⁹)
= 71.31011...
≈ 7.131 × 10¹
Hence the scientific representation is given by 7.131 × 10¹ times.
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walter, agnes, and holly are making beaded lizards. walter has 476 green beads and 32 red beads. agnes has 104 green beads and 16 red beads. holly has 281 green beads and 80 red beads. they all share their beads so as to make the largest possible number of lizards. if a beaded lizard requires 94 green beads and 16 red beads, what is the number of green beads left over?
The number of green beads left over = 15
Walter:
Number of green beads = 476
Number of red beads = 32
Agnes:
Number of green beads = 104
Number of red beads = 16
Holly:
Number of green beads = 281
Number of red beads = 80
Total number of red beads = 32+16+80 = 128 beads
Number of red beads required for making one lizard = 16
Since 128/16 = 8 , there will be no red beads left after making 8 lizards.
Total number of green beads = 476+104+281 = 861 beads
Number of green beads required for making one lizard = 94
Now 861/94 = [tex]9\frac{15}{94}[/tex]
That is , 15 is the remainder when 861 is divided by 94
So there will be 15 green beads left after making 9 lizards.
Therefore, the number of green beads left over = 15
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What is the greatest common factor of 44 and 22?
Answer:
The greatest common factor of 44 and 22 is 22.
Step-by-step explanation:
First, you should list all the factors of 44 and 22. For 44, the factors are: 1, 2, 4, 11, 22 and 44
For 22, the factors are: 1, 2, 11 and 22
The greatest common factor is 22.
Answer: 22
Step-by-step explanation:
In order to find GCF of 44 and 22, take the prime factorization of the two numbers
22: 11*2
44: 11*4=11*2*2
Notice they both have 11*2 in their prime factorization.
11*2=22
GCF of 44 and 22 is 22
if you draw two cards from a deck, what is the probability that you will get the ace of diamonds and a black card?
The probability that the ace of diamonds and a black card will come is 1 / 51 .
Case A :
probability of first getting an ace of diamonds = 1 / 52
probability of getting a black card given first card is ace of diamond = 26 / 51
Hence , probability that the ace of diamonds and a black card will come is ( 1 / 52 ) * ( 26 / 51 ) = ( 1 / 102 )
Case B :
probability of first getting a black card = ( 26 / 52 )
probability of getting an ace , given first card is a black card = ( 1 / 51 )
Hence , the probability that the ace of diamonds and a black card will come is ( 26 / 52 ) * ( 1 / 51 ) = ( 1 / 102 )
P ( A ∪ B ) = P ( A ) + P (B ) + P ( A ∩ B )
= ( 1 / 102 ) + ( 1 / 102 )
= 1 / 51 .
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Which system of linear inequalities is represented by the graph?
y > x – 2 and y < x + 1
y < x – 2 and y > x + 1
y < x – 2 and y > x + 1
y > x – 2 and y < x +
The system of linear inequalities is represented by the graph is y > x – 2 and y < x + 1.
What is inequality?A statement of an order relationship-greater than, greater than or equal to, less than, less than or equal to- between two numbers or algebraic equations.
The given options are,
y > x – 2 and y < x + 1
y < x – 2 and y > x + 1
y < x – 2 and y > x + 1
y > x – 2 and y < x + 1
Since,
The linear equation of a straight line is
y = mx + c,
where m is the gradient or slope, and
y = c is the value where the line cuts the y-axis.
The formula for slope of line with points (x1,y1) and (x2,y2) can be expressed as,
m = (y2 - y1) / (x2 - x1)
Now from y > x – 2 and y < x + 1
the first line passes through (0, 1) and (0, -1)
So,slope m = (0 - 1) / (0 - 1)
⇒ m = 1
Now the line intercept y-axis at (1, 1)
So, c = 1
So,equation of line is given as,
y < x + 1
the second line passes through (0, 2) and (0, -2)
So,slope m = (0 - 2) / (0 - 2)
⇒ m = 1
Now the line intercept y-axis at (-2, 0)
So, c = -2
So,equation of line is given as,
y < x - 2
So, we get y > x – 2 and y < x + 1.
Thus, the system of linear inequalities is represented by the graph is y > x – 2 and y < x + 1.
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The missing graph of the question is attached.
Which expression is equivalent to
3√50 x √22
[tex]{ \qquad\qquad\huge\underline{{\sf Answer}}} [/tex]
lets solve ~
[tex]\qquad \sf \dashrightarrow \: 3 \sqrt{50} \times \sqrt{22} [/tex]
[tex]\qquad \sf \dashrightarrow \: 3 \sqrt{2 \times 5 \times 5} \times \sqrt{2 \times 11} [/tex]
[tex]\qquad \sf \dashrightarrow \: 3 \sqrt{2 \times 2 \times 5 \times 5 \times 11} [/tex]
[tex]\qquad \sf \dashrightarrow \: 3 \times 2 \times 5 \times \sqrt{11} [/tex]
[tex]\qquad \sf \dashrightarrow \: 30 \sqrt{11} [/tex]
[tex]9a-ab+5b if a=2 and b =7[/tex]
Answer:
If you want it graphed the answer is
andb=7
The formula wights are
mass of 1 1 mole of 9 a − a b + 5 b i f a = 2 = 0 g
Step-by-step explanation:
(Total 3 marks)
5. Dave and Tanvir each think of a number, where Dave's number is larger,
The difference between their numbers is $. Dave's number plus twice Tanvir's number is 26
By forming simultaneous equations, determine each bloke's number.
Dave and Tanvir each think of a number, where Dave's number is larger,
The difference between their numbers is 5. Dave's number plus twice Tanvir's number is 26. By forming simultaneous equations, determine each bloke's number. The numbers are 12 and 7.
The number of Dave is 12 and the number of Tanvir is 7.
Given that
Dave and Tanvir each think of a number, where Dave's number is larger.
The difference between their numbers is 5.
Dave's number plus twice Tanvir's number is 26.
To find
By forming simultaneous equations, determine each bloke's number.
So, according to the question
Let's assume that numbers are x and y.
So, we can say that
x - y = 5 ------------(1) and
x + 2y = 26 ------------(2)
We have to solve that equations by using forming simultaneous equations.
For forming simultaneous equations, we have multiply equation(1) by 2, then add eq(2) with result.
So, we will get
2x - 2y = 10
(+) x + 2y = 26
---------------------------
3x +0 = 36
3x = 36
x = 36/3
x = 12
Putting the value of x in equation (1),
We will get,
x - y = 5 ------------(1)
12 - y = 5
- y = 5 - 12
- y = -7
y = 7
The numbers are 12 and 7.
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10 ≤ 3x + 4 < 25
How do I solve
Answer: 2 ≤ x < 7
Step-by-step explanation:
10 ≤ 3x + 4 < 25 ==> solve for x, so work to isolate the x variable
10-4 ≤ 3x + 4-4 < 25-4
6 ≤ 3x < 21
6/3 ≤ 3x/3 < 21/3
2 ≤ x < 7
Answer:
I believe it's [2, 7). It has to be solve differently.
Nora left her house and drove to the store. She stopped and Went inside . From there, she drove in the same direction until she got to the bank. She stopped it and went inside the bank. Then she drove home. The graph below shows the number of blocks away from home Nora in X minutes after after she left her house, until she got back home. How long was Nora in the bank
the meteorologist made a forecast that a cold front was coming through and the temperature would steadily drop 24.8 degrees over the next six and one fourth hours. how much did the temperature drop each hour? 39.68 degrees 3.968 degrees 31.05 degrees 18.55 degrees
The temperature drop is B. 3.968 degrees each hour.
What is the temperature drop calculated?The temperature drop per hour can be computed by dividing the total temperature drop by the number of hours over which the temperature dropped.
Data and Calculations:The total steady drop in temperature = 24.8 degrees
Total number of hours for the temperature drop = 6¹/₄ hours
6¹/₄ hours = 6.25 hours
Temperature drop per hour = total drop/total hours of drop
= 2(4.8 ÷ 6¹/₄ hours)
= 3.968 degrees
Thus, the temperature drop is B. 3.968 degrees each hour.
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Last week, Pablo drove 115 miles. This week, he drove k miles. Using k, write an expression for the total number of miles he drove in the two weeks. 2-Step Equation find me an answer or sum, and givve me 5 stars.
The expression for the total number of miles Pablo drove in the two weeks is (115+k) miles.
What is an Expression?In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.
Given that Last week, Pablo drove 115 miles. This week, he drove k miles. Therefore, the total number of miles for which Pablo drove can be written as,
Total number of miles = Number of miles last week + Number of miles this week
= 115 miles + k miles
= (115 + k) miles
Hence, the expression for the total number of miles Pablo drove in the two weeks is (115+k) miles.
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a box has four cards numbered 1, 2, 3, and 4. greg will toss a coin once and record the toss as heads (h) or tails (t). then he will randomly pick a card from the box and record the number chosen. give the sample space describing all possible outcomes. then give all of the outcomes for the event that the number chosen is 3. use the format h1 to mean that the coin toss is heads and the number chosen is 1. if there is more than one element in the set, separate them with commas.
Sample space when a coin is tossed is {H, T}
Sample space for drawing a card is {1, 2, 3, 4}
Sample space = {H1, H2, H3, H4, T1, T2, T3, T4}
Event that the coin toss is tails = {H1, H2, H3, H4}
The sample space describing all possible outcomes are (H1, H2, H3, H4, T1, T2, T3, T4).
What do you mean by fair coin?A series of independent Bernoulli trials with a chance of 1/2 on each trial is referred to as a fair coin in probability theory and statistics. A biased or unjust coin is one for which the probability is not equal to one-half.
The presumption that a coin is fair is sometimes made by making reference to an ideal coin in theoretical investigations. When John Edmund Kerrich experimented with flipping coins, he discovered that 679 times out of 1000, a coin fashioned of a wooden disc the size of a crown that was coated with lead on one side landed heads (wooden side up).
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The distribution of random variable r has mean 10 and standard deviation 4. The distribution of random variable s has mean 7 and standard deviation 3. If r and s are independent, what are the mean and standard deviation of the distribution of r−s ?.
If [tex]X,Y[/tex] are independent, we have the properties for expectation and variance,
[tex]\Bbb E[aX + bY] = a\,\Bbb E[X] + b\,\Bbb E[Y][/tex]
[tex]\Bbb V[aX + bY] = a^2\,\Bbb V[X] + b^2\,\Bbb V[Y][/tex]
where [tex]a,b\in\Bbb R[/tex] are fixed.
Then
[tex]\Bbb E[R - S] = \Bbb E[R] - \Bbb E[S] = 10 - 7 = \boxed{3}[/tex]
and
[tex]\Bbb V[R - S] = \Bbb V[R] + (-1)^2\, \Bbb V[S] = 4^2 + 3^2 = \boxed{5}\,{}^2 = 25[/tex]
(recall that standard deviation = √(variance))
find the length s of the arc that subtends a central angle of measure 6 rad in a circle of radius 4 cm.
The length of the arc for the given circle is 24cm.
What is the length of an arc of a circle?The Arc length refers to the distance between two points on a section of a curve or a circle.Length of the arc (L) = r Θ, where r = radius of the curve, Θ = angle subtended by the arc at the centre of the curve in radians.Given:
Angle = 6 radians = ΘRadius of circle = 4cm = rTo find: Length of the arc.
Finding:
On substituting the values of r and Θ in the formula of length of the arc, we get:
L = 4(6) = 24 cm.
Hence, the length of the arc for the given circle is 24cm.
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Helpppp I will give 60 points for this one
Answer:
Step-by-step explanation:
A. L+W= 2 in. x 2 in. = 4 in.
the length is 2 in.the width is 2 in. so you multiply 2 in.x 2 in. which = 4 in.Below are some things to help you with perimeter and area(just type it into whatever browser you use, copy and paste)
https://youtu.be/LoaBd-sPzkU
https://th.bing.com/th/id/OIP.Q5D_8qbK_9XGQLj1s0tpbwHaJ3?w=186&h=248&c=7&r=0&o=5&dpr=1.65&pid=1.7
Find the distance between
the two points rounding to the nearest tenth (if necessary).
(8, 7) and (1, -2)
Answer: 11.4
Step-by-step explanation:
in the month of januray, i were able to sell 1,200 desserts. In februaryc, your dessert sales increased to 1,500. What is the percent of change
The increment in the percentage of dessert sales will be 25%.
What is the percentage?The quantity of anything is stated as though it were a fraction of a hundred. A quarter of 100 can be used to express the ratio. Per 100 is what the term percent signifies. The symbol ‘%’ is used to symbolize it.
The percentage is given as,
Percentage (P) = [Final value - Initial value] / Initial value x 100
I was able to sell 1,200 desserts throughout the month of January. Your dessert sales jumped to 1,500 in February.
Then the increment in the percentage will be given as,
P = [(1500 - 1200) / 1200] x 100
P = (300 / 1200) x 100
P = 0.25 x 100
P = 25%
The increment in the percentage of dessert sales will be 25%.
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Ben bowled 128 and 206 in his first two games. What must he bowl in his third game to have an average of at least 190?
Ben must bowl at least
least 190.
in his third game in order to have an average of at
Answer:
236
See the picture below for the work.
Step-by-step explanation:
the length of a rectangle is 2 feet less than the three times length express the area of the rectangle as a function of its width, using correct function notation
The area of the rectangle as a function of its width is a=3b-2.
[tex]s=(3b-2)b\\=3b^{2}-2b[/tex]
[tex]a=3b-2[/tex]
What is the advantages of area ?
Area is significant in contemporary mathematics. Aside from its obvious significance in geometry and calculus, area is also a fundamental characteristic of surfaces in differential geometry and is connected to the definition of determinants in linear algebra. The amount of space within a form is measured by its area.
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What is the result of adding these two equations can you please answer
Think About the Process At a te-known vacation spot, taxi fares are a bargain. A 12-mile taxi ride takes 18 minutes and costs $7.20. You want to find the cost of a 33-minute taxi ride. What unit price
do you need?
We need to find out unit price per minute and the unit price is $0.4 per minute.
According to the question we have been given that
12 mile taxi rides takes = 18 minutes
cost of 12 mile taxi ride = $7.20
Thus we need to find the mile and the cost covered in 33 minutes which will be find out by unitary method.
Thus,
18 minutes taxi ride will cover = 12 mile
33 minutes taxi ride will cover = 12/18*33
= 22 miles
cost of 12 mile taxi ride = $7.20
then, cost of 22 miles taxi ride = 7.20/12 * 22
= $ 13.2
Now we need to find out the unit price which is unit price per minute.
Thus unit price is = $13.2/33
= $ 0.4
Hence we need to find out unit price per minute and the unit price is $0.4 per minute.
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is this a function or not explain why
i need help
sum body help
Answer:
p = independent
t = dependent
The amount of hired truckers will depend on the amount of produce that has to be shipped from California to New York.
Hope this helps :)
17+|-12--5|--6
show how you got the answer
Answer:
I'm assuming the double minus marks meant 5 and 6 were negative. Answer is 30.
Step-by-step explanation:
[tex]17+\abs(-12--5)-(-6)\\17+\abs(-12+5)-(-6)\\17+\abs(-7)-(-6)\\17+7-(-6)\\17+7--6\\24--6\\24+6\\30[/tex]
Answer:The answer would be 28
Step-by-step explanation:17-6 is 11
The absolute value of -12-5 is 17
17+11=28
So therefore the answer would be 28.
image below, what are the domains and ranges?
Answer:
1. domain: -6 ≤ x ≤ 7
range: -6 ≤ y ≤ 4
2. domain: 5 > x
range: -5 < y
Step-by-step explanation:
1. domain: the farthest number left that the line reaches is -6, while the farthest right is 7. due to the line being closed as well as the points being filled in, you use the less than or equal to sign.
range: the farthest number down that the line reaches is -6, while the farthest is goes up is 4. again, since the points are filled in, you use the "or equal to" sign.
2. domain: since the only plotted point is 5, and the point is not filled in, you would say that 5 is greater than x due to the direction that the line moves
range: the lowest part of the line touches -5 and only goes up from there, therefore y is greater than -5
An isosceles triangle has at least two congruent sides. The perimeter of a certain isosceles triangle is at
most 12 in. The length of each of the two congruent sides is 5 in. What are the possible lengths of the
remaining side?
x ≤ 2 but must be greater than 0 . triangles are the possible lengths of the remaining side.
How is an isosceles triangle defined?
Any triangle with (at least) two equal sides is said to be isosceles. The remaining side in the illustration has length in addition to the two equal sides. This characteristic equates to the triangle's two angles being equal.The length of one of the congruent side is 5
The total length of two congruent sides is 10
Perimeter at the most is 12 (meaning the maximum length of perimeter is 12)
The third side of the triangle must be 12-10 = 2 at the most
Writing this requirement as inequality we have
x ≤ 2 but must be greater than 0
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Jerald is having drain issues at his home and decides to call a plumber. The plumber charges $65 to come to his house and $55 for every hour they work. If the plumber charges Jerald a total of $296, how many hours did the plumber work? Write and solve an equation to determine the number of hours worked by the plumber.
A 55x − 65 = 296; x = 6.6 hours
B 55x + 65 = 296; x = 4.2 hours
C 65x − 55 = 296; x = 5.4 hours
D 65x + 55 = 296; x = 3.7 hours
Answer:
B 55x + 65 = 296; x = 4.2 hours
Step-by-step explanation:
The equation to determine the number of hours worked by the plumber is 65 + 55x = 296.
The number of hours worked by the plumber is 4.2
Option B is the correct answer.
What is an equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
We have,
Charges for home visit = $65
Charges for each hour = $55
Let the number of hours = x
Total charges = $296
We can make an equation:
65 + 55x = 296
The number of hours can be calculated.
65 + 55x = 296
Subtracting 65 on both sides.
65 + 55x - 65 = 296 - 65
55x = 231
Dividing both sides by 55.
x = 231 / 55
x = 4.2
Thus,
The equation to determine the number of hours worked by the plumber is 65 + 55x = 296.
The number of hours worked by the plumber is 4.2
Option B is the correct answer.
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Tim (t), isaac (i), and hannah (h) all sell individual insurance policies. isaac sells four times as much as tim, and hannah sells three times as much as isaac. create an equation in terms of tim (t) in order to find the portion he sells.
Using proportions, the equation in terms of Tim is given by:
T(t) = 17t.
What is a proportion?A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct(when both increase or both decrease) or inverse proportional(when one increases and the other decreases, or vice versa), can be built to find the desired measures in the problem, or equations to find these measures.
For this problem, we have that:
Isaac sells four times as much as Tim, hence I = 4t.Hannah sells three times as much as Isaac, hence H = 3I = 3 x 4t = 12t.Hence the total amount, as a function of Isaac's amount, is given by:
T(t) = I + H + t
T(t) = 4t + 12t + t
T(t) = 17t.
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