Answers
Answer:
2.5£ =25tacos
1£ =?
=1*25/2.5
=10 tacos:
Related Questions
Evaluate the following expression
Find 2x - 3y - z if x = -2, y = 3, and z = -2
Answers
Answer:
-11
Step-by-step explanation:
2x - 3y - z
2(-2) - 3(3) - (-2)
-4 -9 +2
-13+2
-11
Answer:
-11
Step-by-step explanation:
What we are solving for: 2x - 3y - z
x = -2
y = 3
z = -2
We can just plug in the variables.
[tex](2*-2) - (3*3) - (-2)[/tex]
[tex]-4-9+2[/tex]
Therefore, the answer is -11.
Hope this helped!!
a candidate was to subtract 15 from a certain number but mistakenly added 25 and his answer was 145 calculate the percentage error correct to 1 decimal places
Answers
The percentage error of the candidate is 38.1%.
What is the percentage?A percentage is a number or ratio expressed as a fraction of 100 in mathematics. Although the abbreviations "pct.", "pct.", and occasionally "pc" is also used, and the percent sign, "%," is frequently used to indicate it. A percentage is a number without dimensions and without a standard measurement.So, the percentage error:
Let x be the specified number.What he ought to have received is x-15.What he actually obtained is given as x+25, which equals 145.Now,
x+25 = 145x = 120He ought to have received x-15 = 120-15 = 105.
Percentage error = [(what he actually got - what he should have gotten)/what he should have gotten] × 100Percentage error = [(145 - 105)/105] × 100 = 38.1%Therefore, the percentage error of the candidate is 38.1%.
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What is the value of the expression 2x² - 7x +3
when x = -4?
A. -1
B. -57
C. 63
D. 7
Answers
I did it with a calculator and got 63
At a gymnastics competition, each competitor performed one gymnastics routine. Each routine was at least 3 minutes long, but not longer than 7 minutes. Write a double inequality to represent the possible length, b, of a gymnastics routine at the competition in minutes.
Answers
We need to know about inequality to solve the given problem. The double inequality to represent the possible length of a gymnastics routine is given by 3≤b≤7.
Inequality is a realtion which makes comparison between numbers or other expressions. Double inequality means when two or more inequalities are joined together. Here in this question we know that each gymnastic routine is at least 3 minutes long. We assume that the length of a gymnastic routine is b, then we can say from the given information 3≤b. It is also said that no gymnastic routine is longer than 7 minutes, so maximum length of any gymnastic routine is 7 minutes, we can write it as, b≤7. Joining these two inequalities we get the double inequality which describes the possible length of a gymnastic routine.
3≤b≤7
Therefore using the concept of inequality we found the double inequality for possible length of gymnastic routine which is 3≤b≤7.
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Which function correctly describes the zeros given?
0,−1,2
A) F(x)= x(x+1)(x-2)
B) F(x)= x(x-1)(x+2)
C) F(x)= (x+1)(x-2)
D) None of these
Answers
Using the factored form of a polynomial for the given zeros, we can see that option A is the correct one, the function is:
F(x) = x*(x + 1)*(x - 2)
Which function correctly describes the zeros given?For a polynomial with the zeros:
x₁, x₂, x₃, ..., xₙ
The polynomial can be written as:
y = (x - x₁)*(x - x₂)*...*(x - xₙ)
In this case, the zeros are:
0, -1, and 2
Then we can write the polynomial as:
y = (x - 0)*(x + 1)*(x - 2)
If we simplify this, we get:y = x*(x + 1)*(x - 2)Which is the one we can see in option A, so we conclude that option A is the correct one.F(x) = x*(x + 1)*(x - 2)
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Least to greatest x-1, V26, 24/5
Answers
V 26
1
<
24
5
Step-by-step explanation:
Solve for y. −140=18+20y−8
Answers
The solution for the variable y according to the one-variable equation given in the task content is; y = -7.5.
What is the solution for the variable y according to the given equation in the task content?It follows from the task content that the equation which is given in the task content and from which the variable y is to be determined is;
−140 = 18 + 20y − 8.
Hence, the equation can be solved as follows;
−140=18+20y−8
Evaluate each side of the equation;
-140 = 10 + 20y
Subtract 10 from both sides;
-150 = 20y
Divide through by 20; we have;
-7.5 = y.
Ultimately, the solution for the variable y as required in the task content is; y = -7.5.
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14-3m=4m
what is the value of m?
Answers
Answer:
2
Step-by-step explanation:
Elissa can do a job in 5 hours. Elissa and Lori working together
can do the same job in 2 hours. How long would it take Lori to
do the job alone?
Answers
5 minus 2 it would be 3
Solve each equation. log₂(x²+2 x)=3
Answers
The value of x for a given logarithmic expression is 2 or -4.
What is a logarithmic function?
Logarithmic function is the inverse of an exponential function. It is denoted by using the word, log. For example log 10 = 1.
Solving the given equation: log ₂ ( x² + 2x ) = 3
Applying given properties of logarithmic and exponential function;
log a + log b = log (ab)
4 log x = log x⁴
e^(log x) = 1
Now, the equation becomes,
log ( x² + 2x ) / log 2 = 3
log ( x² + 2x ) = 3 × log 2
log ( x² + 2x ) = log 2³
log ( x² + 2x ) = log 8
Applying exponent both the sides, we get,
e^[log ( x² + 2x )] = e^[log 8]
x² + 2x = 8
x² + 2x - 8 = 0
(x + 4)(x - 2) = 0
x = 2 or -4
Hence, the value of x for a given logarithmic expression is 2 or -4.
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Someone pls help! 3x ^2 and x = 10 pls help!
Answers
Answer:
300
Step-by-step explanation:
Because of PEMDAS (Order of Operations), you would do the exponent first.
So, 3(x)^2 and 3(100)
Then you get 300
Hope this helps!
Answer:
300
Step-by-step explanation:
3(10^2)
3(100)
300
Which is the logarithmic form of the exponential equation 2³=8 ?
(A) logB 2=3
(B) log₈ 3=2
(C) log₃ 8=2
(D) log₂ 8=3
Answers
The logarithmic form of the exponential equation 2³=8 is (D) log₂ 8=3 .
In mathematics, the inverse function of an exponent is a logarithm. This means that the logarithm of a fixed number, such as a, at base b, is used to represent the exponent to which the fixed number must be raised in order to create the number x.
The general properties of logarithm for a fixed base are:
logₐa=1logₐx+logₐy=logₐxylogₐx-logₐy=logₐ(x/y)logₐxⁿ=n logₐxlogₓy=(logₐy)/(logₐx)The given exponential equation is 2³=8.
To convert the above equation to logarithmic form we have to take logarithm to the base 2 on both sides of the equation.
Taking log₂ on both sides of the equation we get:
log₂(2³)=log₂(8)
Now we know from the properties of logarithms
logₐxⁿ=n logₐx
therefore:
3×log₂(2)=log₂8
Now logₐa=1, so
3×1=log₂8
or, log₂ 8 = 3
Therefore the required logarithmic equation is log₂ 8 = 3.
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The formula for finding the volume of a cube is V = s³, where
s is the length of one side. What is the volume, in cubic units, of
a cube with side length 3 units? Round to the nearest
hundredth when necessary.
Answers
The volume of the cube is determined as 27 unit³.
What is defined as the volume of the cube?A cube's volume is the total number of cubic units it occupies in three dimensions. A cube is a three-dimensional shape with six faces, twelve edges, and eight vertices. As a result, the volume of a cube is defined as the space enclosed by it's own six faces.We can calculate the volume of such a square box simply by measuring the length of one of its sides. The volume of a square box is equal to a cube of the length of its side.The volume is calculated using the formula V = s³, in which "s" is the length of a square box's side.
The cube's side length is 3 units.
The volume of a cube = 3³ unit³.
= 3×3×3
= 27
Thus, the volume of the cube is estimated as 27 unit³.
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CHOOSE THE CORRECT INEQUALITY !! HELP PLEASE :))
Answers
You want the number of steps you take for the rest of the day plus what you have already walked to be greater than or equal to your goal of 11,100
The mean height of the corn plants of variety A is 43.8 inches. Interpret the value of the mean in the situation.
Type your response in the space below.
Answers
The mean or the average height of all the corn plants is 43.8 inches.
There are various mean types in mathematics, especially in statistics.
Each mean is used to summarize a specific set of data, usually to clarify the overall magnitude and sign of the data set.The mean may be mistaken for the median, mode, or midpoint when using descriptive statistics because any of these could be referred to as a "average" (more formally, a measure of central tendency).The arithmetic mean of a set of observations is the sum of all the individual values; however, for skewed distributions, the mean could not be the same as the median or the mode.The average of the frequency distribution is given by the mean of the data set .
Hence the statement here indicates that the average height of all the plants combined is 43.8 inches
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Evaluate the following.
||-2|-|3-12||
Answers
Answer:
7
Step-by-step explanation:
You want the value of the expression ||-2|-|3-12||.
EvaluationInner groups are evaluated first:
||-2|-|3-12|| = |2 -|-9||
= |2 -9|
= |-7| = 7
The value of the expression is 7.
__
Additional comment
The absolute value function changes negative signs to positive:
|-2| = 2
It has no effect on positive signs.
|2| = 2
then |2-9| would be positive 7
4. The simple interest on a savings account is directly proportional to the amount of the investment.
A savings account with $6,000 earns $75.00 after 1 year. Find a mathematical model that gives the
interest Nafter 1 year in terms of the amount invested P, then calculate the simple interest after
saving an amount of $10,500.
Answers
For your problem, we can simplify this a bit to
N = P x R x T
Which just means principal x rate x time
First, let's figure out what interest rate we're getting. We can use our equation to solve for that by substituting each variable with the known amount:
75 = 6000 x R x 1
That simplifies to:
75 = 6,000 x R
0.0125 = R
( Or 1.25%)
To calculate the interest for a new principal, just plug the new numbers into the same equation:
N = 10,500 x 0.0125 x 1
N = $131.25
10)
12
√144
Write the answer as a prime number base ?
Answers
Answer:
144
Step-by-step explanation:
12√144
12 × 12
=144
For a number to be classified as a prime number, it should have exactly two factors. Since 144 has more than two factors, i.e. 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144, it is not a prime number.
can anyone help me out?
Answers
The value of x and y from the given angles 6x - 25, y and 4x + 15 will be x = 20 and y = 85 degrees.
What is vertically opposite angles?The vertically opposite angles are those angles that are opposite one another at a specific vertex and are created by two straight intersecting lines.
The angles are given that 6x - 25, y and 4x + 15
WE can see that the angles 6x - 25 and 4x + 15 are vertically opposite angle, then
6x - 25 = 4x + 15
6x - 4x = 25 + 15
2x = 40
x = 20
Now by linear pair we get
y + 4x + 15 = 180
y + 4(20) + 15 = 180
y = 180 - 80 - 15
y = 100 - 15
y = 85
Therefore, the value of x and y from the given angles 6x - 25, y and 4x + 15 will be x = 20 and y = 85 degrees.
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An urn contains 5 tiles, each containing one of the numbers from 1 to 5. An experiment consists of selecting a tile, marking down its number, then replacing it and selecting a second tile and marking down its number. How many outcomes are in the sample space for this experiment?.
Answers
The number of outcomes in the sample space is 25
First time taking the tile out of urn and marking it down, the possibilities are 1,2,3,4,5
After replacement of the tile, once again there are 5 tiles in the urn.
Second time taking the tile and marking it down, the possibilities are 1,2,3,4,5
The sample space is set of all possibilities, which is
S = {(1,1),(1,2),(1,3),(1,4),(1,5),(2,1),(2,2),(2,3),(2,4),(2,5),(3,1),(3,2),(3,3),(3,4),(3,5),(4,1),(4,2),(4,3),(4,4),(4,5),(5,1),(5,2),(5,3),(5,4),(5,5)}
S=25
The number of outcomes in the sample space is 25
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The size of a computer monitor is given as the length of the screen's diagonal d in inches. The equation d=5/6√3A models the length of a diagonal of a monitor screen with area A in square inches.
b. Suppose you want to buy a new monitor with a screen that is twice the area of your old screen. Your old screen has a diagonal of 15 inches. What will be the diagonal of your new screen?
Answers
The diagonal of the new screen is approximately 21.21 inches.
The diagonal is a straight line that joins two opposite sides of a quadrilateral(polygon with 4 sides).
The length of the diagonal of the square is given as d=5/6√3A where A is the area of the square.
Now when diagonal d=15 cm then we substitute the value of d=15 to calculate area A of the square.
15=5/6√(3A)
or, 3A=15²×6²÷5² (squaring both sides)
or, A=108 square inches
The new monitor has an area of twice the old monitor.
Area of the new monitor =2×108 square inches=216 square inches.
Now we use the value of A=216 to calculate the value of diagonal d for the new monitor.
d=5/6√(3×216)
d=21.213.. inches
Therefore the diagonal of the new screen is approximately 21.21 inches.
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Carrie had 34 tiles. She said that she used all of her tiles to make an array with 5 rows. Could she be correct? Explain why or why not on the lines below.
Answers
Select the correct texts in the passage.
Julian factored the expression 2x4 + 2x³ x²-
At which step did Julian make his first mistake, and which statement describes the mistake?
Step 1
Step 2
Step 3
=
=
2x² + 2x³
x(2x²
= C
-
-
x²
x(2x³ + 2x² x − 1)
-
x (2x² (x + 1))
-
-
- X
-
-. His work is shown.
- 1(x − 1)
1) (x + 1)(x - 1)
Julian should have factored (2x²
Julian incorrectly factored -1 from the second group of terms.
Julian should have factored 2x from all terms instead of x.
Julian incorrectly factored 2x2 from the first group of terms.
1) as a difference of squares.
Answers
Julian factored the expression of [tex]2x^{4} +2x^{3} -x^{2} -x[/tex], then the
step 2 ( [tex]x(2x^{2} +1)) -1(x-1)[/tex]) statement is wrong statement.
Julian should have factored (2*2-1) as a difference of squares.
Julian incorrectly factored -1 from the second group of terms.
Julian should have factored 2x from all terms instead of x
Julian incorrectly factored 2*2 from the first group of terms
The expression is, [tex]2x^{4} +2x^{3} -x^{2} -x[/tex]
Factors greatest common factors out,
= [tex]x(2x^{3} +2x^{2} -x-1)[/tex]
Regroup terms into two proportional parts,
= [tex]x((2x^{3} +2x^{2} )+(-x-1))[/tex]
Factor the expression,
= [tex]x(2x^{2} (x+1)+(-x-1))[/tex]
= [tex]x(2x^{2} (x+1)-(x+1))[/tex]
= [tex]x(x+1)(2x^{2} -1)[/tex]
Hence, we can write,
= [tex]2x^{4} +2x^{3} -x^{2} -x[/tex]
= [tex]x(2x^{3}+2x^{2} -x-1)[/tex]
So step 1 is correct.
= [tex]x(2x^{2} (x+1)-(x+1))[/tex]
Then, step 2 is wrong.
Therefore, the expression of [tex]2x^{4} +2x^{3} -x^{2} -x[/tex], then the
step 2 ( [tex]x(2x^{2} +1)) -1(x-1)[/tex] )statement is wrong statement.
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Answer:
Julian should have factored (2x^2-1) as a difference of squares.
Step-by-step explanation:
m∠WYX = (2x − 7)° and m∠WYZ = (3x + 2)°. If ∠WYX and ∠WYZ are complementary,
what is the measure of each angle?
A) m∠WYX = 67°; m∠WYZ = 113°
B) m∠WYX = 27°; m∠WYZ = 63°
C) m∠WYX = 31°; m∠WYZ = 59°
D) m∠WYX = 63°; m∠WYZ = 117°
Answers
The values of m∠WYX and m∠WYZ are 31° and 59° respectively. Option C
What are complementary angles?Complementary angles are defined as angles that sum up to 90 degrees.
Example:
If x and y are complementary angles, then;
x + y = 90°
From the information given, we have the angles;
m∠WYX = (2x − 7)° m∠WYZ = (3x + 2)since they are complementary, then;
2x - 7 + 3x + 2 = 90
collect like terms
2x + 3x = 90 + 5
Add like terms
5x = 95
Make 'x' the subject of formula
x = 95/5
x = 19
But;
m∠WYX = (2x − 7) = ( 2(19) - 7) = 38 - 7 = 31°
m∠WYZ = (3x + 2)° = (3(19) + 2) = 57 + 2 = 59°
Thus, the values of m∠WYX and m∠WYZ are 31° and 59° respectively. Option C
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Between 10 P.M. and 7:36 A.M., the water level in a swimming pool decreased by 6/25 in. Assuming that the water level decreased at a constant rate, how much did the water level drop each hour?
Answers
Answer:
The water level drop in temperature per hour is 40 °C per hour
Unit rate
Hours between 10 P.M. and 7:36 A.M = 9 hours 36 minutes
= 9.6 hours
The total decrease in temperature = 6/25
The unit rate of decrease in temperature per hour = Hours between 10 P.M. and 7:36 A.M ÷ Total drop in temperature
= 9.6 ÷ 6/25
= 9.6 × 25/6
= 240/6
= 40 °C per hour
Therefore, the water level drop in temperature per hour is 40 °C.
Find the number that makes the ratio equivalent to 1:5.
5:
Answers
Answer:
25
Step-by-step explanation:
[tex]\frac{1}{5}[/tex] = [tex]\frac{5}{x}[/tex] On the top, you need to multiply 1 by 5 to get 5, so multiply the bottom number 5 by 5 to get 25.
Two financial institutions offer different deals to new customers. The first bank offers an interest rate of 3% for the first year and 2% for the next two years. The second bank offers an interest rate of 2.49% for three years. You decide to invest the same amount of principal in each bank. To answer the following, assume you make no withdrawal or deposits during the three-year period.
a. Write a function that represents the total amount of money in the account in the first bank after three years.
Answers
Total amount of money in the account in the first bank after 3 years will be given by the function: P[tex]e^{0.07}[/tex].
The formula for calculating the amount (A) on a principal (P) invested at the rate of r%, compounded continuously after t years is-
A = P[tex]e^{rt}[/tex]
Here, we are given that there are 2 financial institutions-
1st financial institution:
interest rate = 3% for the first year
and interest rate for next two years = 2%
2nd Financial institution:
interest rate = 2.49% for three years
Let the principal amount deposited be P
We assume that the interest is compounded continuously.
Then for the 1st year-Amount = P[tex]e^{0.03}[/tex]
Since, there are no withdrawals or deposits,
The Amount of the 1st year will become the principal for the second year-Amount = (P[tex]e^{0.03}[/tex]) [tex]e^{0.02 * 2}[/tex]
= P × [tex]e^{0.03}[/tex] × [tex]e^{0.04}[/tex]
= P[tex]e^{(0.03 + 0.04)}[/tex]
= P[tex]e^{0.07}[/tex]
Thus, the total amount of money in the account in the first bank after 3 years will be- P[tex]e^{0.07}[/tex].
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how can I cheat on ixl other than the inspect element or a person to help me.
Answers
Answer:
Don't cheat, there is your answer.
Step-by-step explanation:
One of the biggest problems that the students face while getting correct answers is the timeline. What if we trick the time counter itself? Think of the situation when the user leaves the main screen and searches for something else on the site. In such a situation, The timer gets tricked. As a result, it won’t record the practical time.
What is an equivalent form of 15(p + 4) − 12(2q + 4)?
15p − 24q + 12
15p − 24q + 8
60p − 72q
−9pq
Answers
Answer:
=15p+60-24q-48=15p-24q+12
it's the first one
The equivalent form of the given expression will be 15p - 24q +8. Hence, the first option is correct.
What is an Expression?In mathematics, expressions are assertions that must contain at least two words with variables or terms with numbers in them, or both, and connect them with an operator. It is possible for the mathematical operators to be addition, subtraction, multiplication, or division.
For instance, the equation (x+y) has the terms x and y with an addition operator in between. Numerical expressions, which just contain numbers, and algebraic expressions, which also include variables, are the two types of expressions used in mathematics.
The given expression in the question,
15(p + 4) - 12(2q + 4)
15p + 60 - 24q - 48
15p - 24q + 12.
Hence, it is proved that the equivalent form of the expression is 15p - 24q + 12.
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Quincy was stuck inside for an hour during a storm. He spent 20 minutes reading, 18 minutes
eating lunch, 12 minutes watching television, and 10 minutes drawing.
Match the following ratios to what they describe.
Description
The ratio of time inside to time eating lunch
The ratio of time eating lunch to time watching television
The ratio of time reading to time drawing
Ratio
2:1
10:3
3:2
Answers
The ratio of time inside to time eating lunch Ratio: 3:2
The ratio of time eating lunch to time watching television Ratio: 10:3
The ratio of time reading to time drawing Ratio: 3:2
What is the ratio?
A ratio is a mathematical comparison between two numbers that indicates how many times one value is contained within the other.
Description: The ratio of time inside to time eating lunch
Ratio: 3:2
Description: The ratio of time eating lunch to time watching television
Ratio: 10:3
Description: The ratio of time reading to time drawing
Ratio: 3:2
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Answer:
the ratio of time inside to time eating lunch 10: 3
the ratio of time eating lunch to time watching television 3:2
the ratio of time reading to time drawing 2:1
Step-by-step explanation:
I got it wrong following the other person this is what Khan academy says is correct.