Answer:
C
Step-by-step explanation:
I took the test
Frank made $80 for 5 hours of work,
At the same rate, how much would he make for 17 hours of work?
Answer:
$272
Step-by-step explanation:
We're going to make an equation
we'll make x hours
5x=80
solve for x and you get 16 dollars an hour
16 times 17 is 272
the length of a rectangle is five times its width. If the perimeter of the rectangle is 84 in, find its length and width
Answer:
width=14 &Length = 70( can add unit behind the answer e.g.cm or mm etc..)
Step-by-step explanation:
we know that in a rectangle not all side are same compare to a square..
therefore:
1) write the formula for perimeter down
perimeter = the sum of all side
perimeter = 2x(width) + 2x(length)
P=2(w)+2(L)
2) substitute into the equation
P =2(w)+2(L)
84=2(w)+2(5*w)
3) perform opposite operation to make w become the subject of the formula inorder to find width
48=2(w)+2(5*w)
48=2w+10w
48=12w
48/12=12w/12( the twelves cancels out)
7=w or the width is 7
4) rewrite the formula and solve
P=2(w)+2(L)
P =2(7) + 2(5*7)
P = 14 + 70
P = 48
does anyone know how to solve these
Answer:
e=49
f=131
d=90
Step-by-step explanation:
Carlos had $41 when he went to a bookstore. He had $10 left after buying some books. Which equation can be used to find a, the amount Carlos spent on books?
Answer:
$41 - $a =$ 10
Step-by-step explanation:
$41 - $a =$ 10
$a = $ 41 - $10
$a= $ 31
8. Fred is ordering pies for a family reunion. Each pie costs $4.50. For orders
smaller than a dozen pies, there is a $5 delivery charge. Is the cost proporti
to the number of pies ordered? Use a table of values to explain your reason
Answer:
Yes, because the more pies ordered the more money it will cost to buy them all
Step-by-step explanation:
total cost is not proportional to the number of pies.
What is proportionality?the property of having suitable proportions in terms of size, number, degree, harshness, etc.: If a defensive action against an unfair attack results in the destruction that contravenes the proportionality criterion, it may even go far beyond a justifiable defense.
given Fred is ordering pies for a family reunion. Each pie costs $4.50. For orders smaller than a dozen pies, there is a $5 delivery charge.
Fred is ordering pies for a family reunion. Each pie cost $4.50. For orders smaller than a dozen pies, there is a $5 delivery charge.
Let us draw a table for the number of pies and the total cost
Number of pie Total Cost
1 $4.50+5=$9.50
2 $9+5=$14
3 $13.50+5=$18.50
4 $18+5=$230
5 $22.50+5=$26.50
now Total cost/number pies = 9.50/1 is not equals to 14/2
Therefore the total cost is not proportional to the number of pieces
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Hudson and Knox are in a race. Hudson is running at a speed of 8. 8 feet per second. Knox got a 30-foot head start and is running at a speed of 6. 3 feet per second. How many seconds will it take until Hudson and Knox have run the same number of feet? Write the equation
It will take 12 seconds until Hudson and Knox have run the same number of feet.
Let's denote the time it takes until Hudson and Knox have run the same number of feet as "t" (in seconds).
The distance Hudson runs can be calculated by multiplying his speed (8.8 feet/second) by the time "t". Thus, the distance Hudson covers is 8.8t feet.
Knox, on the other hand, had a head start of 30 feet. So the distance Knox covers can be calculated by multiplying his speed (6.3 feet/second) by the time "t" and adding the head start of 30 feet. Thus, the distance Knox covers is 6.3t + 30 feet.
To find the time when both runners have covered the same distance, we set their distances equal to each other:
8.8t = 6.3t + 30
Simplifying the equation:
2.5t = 30
Dividing both sides by 2.5:
t = 30 / 2.5
t = 12
Therefore, it will take 12 seconds until Hudson and Knox have run the same number of feet.
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2. Use mathematical induction to show that n(n+1)(2n+1) is divisible by 6 for all positive integers n.
The given statement: n(n+1)(2n+1) is divisible by 6 for all positive integers n.
Step-by-step explanation: We need to prove that n(n+1)(2n+1) is divisible by 6 for all positive integers n using mathematical induction.
Step 1: First, lets prove the statement for the smallest possible value of n. The smallest value of n is 1. So, let's check whether the given statement is true for n = 1 or not.
\(LHS = 1(1+1)(2*1+1) = 6\)
It is divisible by 6. Hence, the statement is true for n=1.
Step 2: Let's assume that the statement is true for n=k. So, we can say that n(n+1)(2n+1) is divisible by 6 for n=k. i.e., n(n+1)(2n+1) = 6a (for some integer a).
Step 3: We need to prove the statement is true for n=k+1.
So, we need to prove that (k+1){(k+1)+1}[2(k+1)+1] is divisible by 6
Using the assumption we made in step 2.
\(LHS = (k+1){(k+2)}[2k+3] = (k+1)(k+2)(2k+3)LHS = (2k+3)k(k+1)(k+2)LHS = 2[k(k+1)(k+2)] + 3[k(k+1)]\)
Now, k(k+1)(k+2) is divisible by 6 using the assumption made in step 2.
So, LHS = 2[k(k+1)(k+2)] + 3[k(k+1)] is also divisible by 6.
Hence, the statement is true for n=k+1.
Step 4: Using steps 1 to 3, we can say that the given statement is true for n=1 and if it is true for n=k, then it is also true for n=k+1.
Hence, by mathematical induction, we can say that the statement is true for all positive integers n.
Hence, it is proved that n(n+1)(2n+1) is divisible by 6 for all positive integers n.
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please help i give brainliest
Answer:
it is B.
Step-by-step explanation:
hope this helped!
plz give brainliest!
solve for x, geometry help needed.
please help.
Answer:
2
Step-by-step explanation:
37x+106=180
37x=74
x=2
May I please get help with this question dont understand it
Step-by-step explanation:
(f + g)(-1) = f(-1) + g(-1)
f(-1) = -1 -2 = -3
g(-1) = (-1)² + (-1) -6 = -6
(f+g)(-1) = -9
Answer:
(f + g)(- 1) = - 9
Step-by-step explanation:
note (f + g)(x) = f(x) + g(x)
f(x) + g(x)
= x - 2 + x² + x - 6 ← collect like terms
= x² + 2x - 8
To evaluate (f + g)(- 1) substitute x = - 1 into (f + g)(x), that is
(f + g)(- 1)
= (- 1)² + 2(- 1) - 8 = 1 - 2 - 8 = - 9
Use synthetic division to divide.
(6x³ +3x + 9) \ (x + 2)
Answer:
Step-by-step explanation:
If a 98% confidence interval has bounds 73 and 80, which of the following could be the bounds for a 95% confidence interval? A. 73 and 81. B. 72 and 79. C. 72 and 81. D. 74 and 79.
The bounds for a 95% confidence interval could be option (B) 72 and 79
We know that the 98% confidence interval has bounds of 73 and 80. This means that if we were to repeat the same experiment many times, we would expect that 98% of the time, the true population mean would fall within this range.
To find the bounds for a 95% confidence interval, we can use the fact that a higher confidence level corresponds to a wider interval, and a lower confidence level corresponds to a narrower interval.
Since we want a narrower interval for a 95% confidence level, we can expect the bounds to be closer to the sample mean. We can calculate the sample mean as the midpoint of the 98% confidence interval
(sample mean) = (lower bound + upper bound) / 2 = (73 + 80) / 2 = 76.5
Next, we can use the formula for a confidence interval:
(sample mean) ± (z-score) × (standard error)
where the z-score depends on the desired confidence level, and the standard error depends on the sample size and sample standard deviation. Since we don't have this information, we can assume that the sample size is large enough (i.e., greater than 30) for the central limit theorem to apply, and we can use the formula
standard error = (width of 98% CI) / (2 × z-score)
For a 98% confidence interval, the z-score is 2.33 (found using a standard normal distribution table or calculator). Plugging in the values, we get
standard error = (80 - 73) / (2 × 2.33) = 1.70
Now, we can use this standard error to calculate the bounds for a 95% confidence interval
(sample mean) ± (z-score) × (standard error) = 76.5 ± 1.96 × 1.70
Simplifying, we get
(lower bound) = 76.5 - 3.33 = 73.17
(upper bound) = 76.5 + 3.33 = 79.83
Therefore, the correct option is (B) 72 and 79
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Julia owns a food truck that sells tacos and burritos. She only has enough supplies to make 67 tacos or burritos. She sells each taco for $3.75 and each burrito for $6. Julia must sell no less than $330 worth of tacos and burritos each day. If 42 burritos were sold, determine all possible values for the number of tacos that Julia must sell in order to meet the requirements. Your answer should be a comma separated list of values. If there are no possible solutions, submit an empty answer.
Julia must sell 21 tacos to meet the requirement .
Given: Price of each taco = $ 3.75
Price of each burrito = $ 6
Total amount of money she needs to earn = $ 330
Also the number of burritos sold= 42.
So the total amount earned on selling these burritos= 42× 6 = $ 252
And as it is given that total money she needs to earn is $ 330 .
so required money= $ 330- $ 252
=$ 78
Thus the total number of tacos she needs to sell = 78/ price of 1 taco
= 78/ 3.75
= 20.8 ≈ 21
Thus Julia must sell 21 tacos to meet the requirement .
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PLEASE HELP I WILL GIVE BRAINLIEST FOR THE CORRECT ANSWER!!
Use mathematical induction to prove that 1 + 2 + 3 + … + n = (1/2) n (a1 + an).
Use the result to find the sum of 1 + 2 + 3 + ... + 500.
Answer:
See below for proof.
\(S_{500}=125250\)
Step-by-step explanation:
Given arithmetic series:
1 + 2 + 3 + … + nTherefore:
\(S_n=1+2+3+...+(n-2)+(n-1)+n\)
\(S_n=1+(1+1)+(1+2)+...+(1+n-3)+(1+n-2)+(1+n-1)\)
\(S_n=1+(1+1)+(1+2(1))+...+(1+(n-3)(1))+(1+(n-2)(1))+(1+(n-1)(1))\)
Let:
a = first term = 1d = common difference = 1n = nth termTherefore:
\(S_n=a+(a+d)+(a+2d)+...+(a+(n-3)d)+(a+(n-2)d)+(a+(n-1)d)\)
Reverse the order:
\(S_n=(a+(n-1)d)+(a+(n-2)d)+(a+(n-3)d)+...+(a+2d)+(a+d)+a\)
Add the two expressions for Sₙ:
\(2S_n=(2a+(n-1)d)+(2a+(n-1)d)+(2a+(n-1)d)+...+(2a+(n-1)d)\)
Therefore, the term (2a + (n – 1)d) has been repeated n times:
\(2S_n=n(2a+(n-1)d)\)
Divide both sides by 2:
\(S_n=\dfrac{1}{2}n(2a+(n-1)d)\)
\(S_n=\dfrac{1}{2}n(a+a+(n-1)d)\)
Replace a with a₁ (first term) and a + (n – 1)d with aₙ (last term):
\(S_n=\dfrac{1}{2}n(a_1+a_n)\)
To find the sum of the series 1 + 2 + 3 + ... + 500, substitute the following values into the formula:
a₁ = 1aₙ = 500n = 500Therefore:
\(\implies S_{500}=\dfrac{1}{2}(500)(1+500)\)
\(\implies S_{500}=250(501)\)
\(\implies S_{500}=125250\)
PLEASE HELP
ASAP!! i’ve been on it for 2 hrs
C. Two vectors are said to be parallel if they point in the same direction or if they point in
opposite directions.
i. Are the vectors = < 1> and = <--1> parallel? Show your work and explain.
Type your response here:
ii. Are the vectors = <2, 3> and = <-3, -2> parallel? Show your work and explain.
Type your response here:
Answer:
Hey there,
The answer is below!!
Step-by-step explanation:
Knowing that those vectors start at the point (0,0) we can "think" them as lines.
As you may know, two lines are parallel if the slope is the same, then we can find the "slope" of the vectors and see if it is the same.
A) the vectors are: (√3, 1) and (-√3, -1)
You may remember that the way to find the slope of a line that passes through the points (x1, y1) and (x2, y2) is s = (y2 - y1)/(x2 - x1)
Because we know that our vectors also pass through the point (0,0)
then the slopes are:
(√3, 1) -----> s = (1/√3)
(-√3, -1)----> s = (-1/-√3) = (1/√3)
The slope is the same, so the vectors are parallel.
Part B:
The vectors are: (2, 3) and (-3, -2)
the slopes are:
(2, 3) -----> s = 3/2
(-3, -2)----> s = -2/-3 = 2/3
the slopes are different, so the vectors are not parallel.
Find the value of x.
(Round to the nearest tenth as needed.)
Answer:
27.7 degrees
Step-by-step explanation:
We can use the inverse sine to find the angle x as we are given the opposite sided length and the hypotenuse
x = sin-1(13/28)
x = 27.66
x = 27.7 (round to tenths)
The triangles shown below must be congruent.
O True
O False
For the Adjusted R Squared, which of the following is true: a. Is the same R 2
as in the simple linear regression b. Can decrease if the addition of another X regressor does not lower SSR enough relative to the impact of the increase of k by another X regessor. c. Is between 0 and 1 d. Measures the ratio of the sum of squared residuals compared to the total sum of squares
The correct statement is c. The Adjusted R-squared is a measure used in multiple regression analysis that is between 0 and 1. It is different from the R-squared value in simple linear regression.
The Adjusted R-squared can decrease if the addition of another X regressor does not sufficiently lower the sum of squared residuals (SSR) relative to the impact of increasing the number of predictors (k). It measures the proportion of the variance explained by the predictors, adjusted for the number of predictors and the sample size, rather than the ratio of the sum of squared residuals to the total sum of squares. It provides a measure of how well the regression model fits the data, and it ranges between 0 and 1. A value closer to 1 indicates that a higher proportion of the variance in the dependent variable is explained by the predictors.
Adding another X regressor to the multiple regression model can impact the Adjusted R-squared. If the additional regressor does not significantly contribute to reducing the sum of squared residuals (SSR) relative to the increase in the number of predictors (k), the Adjusted R-squared can decrease. This means that the added regressor does not improve the model's ability to explain the variance in the dependent variable adequately.
However, the Adjusted R-squared does not directly measure the ratio of the sum of squared residuals to the total sum of squares. Instead, it represents the proportion of the variance explained by the predictors, adjusted for the number of predictors and the sample size. It penalizes models with a large number of predictors that may overfit the data, thereby providing a more reliable measure of the model's goodness of fit.
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How many 1/16's are in 1/4 inch?
Answer:
There are 4 sixteenths in one-fourth. To find how many sixteenths are in one-fourth, we need to divide 1/4 by 1/16.
Step-by-step explanation:
There are 4 1/16's in 1/4 inch after making a linear equation x(1/16) = 1/4 the answer is 4.
What is a fraction?Fraction number consists of two parts, one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.
The expression can be defined as the combination of constants and variables with mathematical operators.
Let x be the number of 1/16 in 1/4 inch
x(1/16) = 1/4
It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.
After simplification:
x = 16/4
x = 4
Thus, there are 4 1/16's in 1/4 inch after making a linear equation x(1/16) = 1/4 the answer is 4.
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Use the solution method from this example to find a basis for the given subspace. S = span {[1 -1 0 2], [3 -5 4 8], [0 1 -2 -1]} Give the dimension of the basis. v
Answer:
Step-by-step explanation:
The dimension of the basis is {[1 0 0 2], [-1 1 0 0]}.
To find a basis for the subspace S = span {[1 -1 0 2], [3 -5 4 8], [0 1 -2 -1]}, we can use the same method as in the example. First, we put the vectors in a matrix and row-reduce it:
[1 -1 0 2]
[3 -5 4 8]
[0 1 -2 -1]
R2 - 3R1 -> R2
R3 -> R3 + 2R1
[1 -1 0 2]
[0 -2 4 2]
[0 1 -2 -1]
-1/2R2 -> R2
[1 -1 0 2]
[0 1 -2 -1]
[0 1 -2 -1]
R3 - R2 -> R3
[1 -1 0 2]
[0 1 -2 -1]
[0 0 0 0]
We can see that the last row is all zeros, so we have only two pivots and one free variable. This means that the dimension of the subspace S is 2. To find a basis, we can write the pivots as linear combinations of the original vectors:
[1 -1 0 2] = [1 0 0 2] + [-1 1 0 0]
[0 1 -2 -1] = [0 1 -2 -1]
Therefore, a basis for S is {[1 0 0 2], [-1 1 0 0]}.
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A carton of grapefruit juice displays the nutritional information shown below. How many grams of sugar are there in a 200 ml glass of juice? Grapefruit juice 250 ml contains Carbohydrate Sugar Protein 19.5 g | 16.5 g | 1.5 g
Answer:
13.2 g
Step-by-step explanation:
let x = grams sugar in a 200 ml glass
16.5 g sugar / 250 ml = x g sugar / 200 ml
x(250) = (16.5)(200)
x = (16.5)(200) / (250) = 3300 / 250 = 13.2
Answer: there are 13.2 g sugar in a 200 ml glass of juice
((−3,−2),(3,0),(1,4),(−5,2)] 5tep 1 of 31 Find the slopes of the indicated sides of the quadrilateral 5 implify your answer. Answer side connecting (−3,−2) and (−5,2) Side connecting (3,0) and (1,4)
The slope of the side connecting (-3,-2) and (-5,2) is -2/2 = -1.
The slope of the side connecting (3,0) and (1,4) is (4-0)/(1-3) = 4/-2 = -2.
To find the slope of a line, we use the formula:
slope = (change in y)/(change in x)
For the side connecting (-3,-2) and (-5,2), we can calculate the change in y as 2 - (-2) = 4 and the change in x as -5 - (-3) = -2. Therefore, the slope is given by:
slope = (4)/(-2) = -2/2 = -1.
Hence, the slope of the side connecting (-3,-2) and (-5,2) is -1.
For the side connecting (3,0) and (1,4), we calculate the change in y as 4 - 0 = 4 and the change in x as 1 - 3 = -2. Applying the slope formula, we have:
slope = (4)/(-2) = -2.
Therefore, the slope of the side connecting (3,0) and (1,4) is -2.
In summary, the slope of the side connecting (-3,-2) and (-5,2) is -1, and the slope of the side connecting (3,0) and (1,4) is -2. The slopes represent the rate of change between two points on the respective sides of the quadrilateral.
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It takes Andre 4 minutes to swim 5 laps. How many laps per minute is that?
please answer this quick bc im timed
Answer:
1/2
Step-by-step explanation:
What is the solution y 2 3x 3 x =- 2?
The solution of the equation y = (2/3)x + 3 is 5/3
The given equation is
y = (2/3)x + 3
The slope of the line is the change in y coordinates with respect to the change in x coordinates.
This is the linear equation in the the slope intercept form
y = mx + b
Where m is the slope of the line
b is the y intercept
y is the y coordinates
x is the x coordinates
The value of x = -2
Substitute the value of x in the equation
y = (2/3) × -2 + 3
Do the arithmetic operations
= -4/3 + 3
Add the numbers
= 5/3
Therefore, the solution is 5/3
I have solved the question in general, as the given question is incomplete
The complete question is:
What is the solution of the equation y = (2/3)x + 3x, when x = -2?
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amanda had to pay sales tax on a new iphone case she purchased last week. The iphone case was 35.00 and she pid 2.45 in taxes, what percent of the original price did she pay in taxes?
HELP
Answer:
7%
Step-by-step explanation:
\(\frac{2.45}{35} = \frac{x}{100}\)
\(2.45*100\) and \(35x\)
\(\frac{245}{35} = \frac{35x}{35}\)
\(245/35=7\)
what property of equality of congruence is this?
“If x/5=30, then x=150”
A. Addition property
B. Subtraction property
C. Multiplication property
D. Division property
C. Partition property
D. Reflexive property
E. Transitive property
F. Substitution property
C. Multiplication property
Step-by-step explanation:Properties of equality and congruence are properties that show how equations or shapes can be changed but remain equal.
Properties of Equality
Since this question deals with an equation, not a shape, the properties of equality will be used. The most common properties of equality include:
Addition - states that if the same number is added to both sides, the equation is still equal.Subtraction - states that if the same number is subtracted from both sides, the equation remains true.Multiplication - states that if the same number is multiplied on both sides, the equation is still true.Division - states that if the same number is divided on both sides, the equation remains equal.The important thing to note is that whatever is done to one side, must be done to both. No matter what operation it is, if you change the equation you must change both sides equally.
Solving for X
To find the correct property, we need to solve for x. Do this by isolating the variable.
First, let's rewrite the equation.
\(\displaystyle\frac{x}{5}=30\)Now, we need to find a way to isolate the variable. To isolate x, we need to get rid of the denominator, 5. Do this by multiplying both sides by 5. This will cancel out the denominator on the left side. Remember to multiply on both sides.
\(\displaystyle\frac{x}{5}*5 =30*5\)Then, simplify the equation
\(x=150\)To solve this equation, we multiplied both sides by the same number. This matches the definition of the multiplication property of equality, so that must be the correct answer.
Find A U { }. If A is any given set
Answer:
A U { } = A
Step-by-step explanation:
Union is one of the operations that are performed on sets. In union, the elements of involved sets are combined and repetitive elements are removed (written only once)
Given
A U { } = ?
Whenever union will be taken of any set and empty set the answer will be the set.
Similarly, when union of set A will be taken with empty set the result will be set A.
Hence,
A U { } = A
please help besties
Answer:
200.96
Step-by-step explanation:
64x3.14=200.96
Answer:
A= 200.96in2
Step-by-step explanation:
8×8=64
64×3.14=200.96
Can someone answer this it's in the pictures
Answer:
go to mathaway.com
Step-by-step explanation:
PLS PLS HELP ME THIS IS DUE IN A FEW HOURS!!!!!!! :(