1
Write an expression for seven more than twice a number is twenty-one.
2x+7=21
Sara tracks lap times around the pool. She records a time of 87.7 seconds for one of her friends, but the actual time was 87.51 seconds. What is the most appropriate measure of the difference between the two times?
0.71 seconds
0.2 seconds
0.35 seconds
0.19 seconds
0.19 seconds
Write an expression for the sum of a number and five is equal to three times the number.
x+5=3x
Write an expression for the product of eight and a number is the same as the number increased by twelve.
8x=x+12
Write an expression for half of a number decreased by four is ten.
x/2-4=10
Simplify 3(x+2)+4(x−1)
7x+2
Simplify 5(2y−3)−3(y+4)
7y-27
Simplify 2(a+4)+3(a−2)
5a+2
Simplify 6m−2(3m−5)
10
Simplify 4(2x−1)+2(3x+5)
14x+6
a(b+c)=d Solve for a
a=d/(b+c)
If f(x)=9x+5, what is the value of f(4)
41
a(b+c)=d Solve for c
c= d/a+b
x-y=z-w Solve for w
w=-x+y+z
A bakery charges $25 for ingredients, plus $15 per hour for labor to decorate a custom cake. Which function can be used to find the total cost C(h) to decorate a cake that requires h hours?
C=25+15h
How much money was saved at six weeks? pic 1
$800
A moving company charges a fixed fee plus a daily rental rate for a truck. The total cost can be modeled by the expression 20+25d, where d is the number of days the truck is rented. What does 25d represent in the expression?
25 is the daily rental rate and d is the number of days rented.
If f(x)=8x+4, what is the value of f(3)
28
If f(x)=5x-3, what is the value of f(6)
27
A landscaping company charges $40 for equipment use, plus $35 per hour for labor. How would you write an equation to find the total cost C(h) for a job that takes h hours to complete?
C=40+35h
Rectangle A has lengths of 5x+7 and 5x+7 and heights of 4x+3 and 4x+3. Rectangle B has lengths of 8x+2 and 8x+2 and heights of 9x and 9x. Rectangle A and rectangle B have the same perimeter. What is that perimeter?
Perimeter=38
What are the x-intercept and y-intercept for the following function? pic 2
x-intercept (1.5,0) y-intercept (0,1)
What are the x-intercept and y-intercept for the following function? pic 3
x-intercept (4,0) y-intercept (0,2)
What are the x-intercept and y-intercept for the following function? pic 4
x-intercept (4,0) y-intercept (0,-2)
What are the x-intercept and y-intercept for the following function? pic 5
x-intercept (4,0) y-intercept (0,-3)