Quadratic EOC Review

Suppose that the equation V = 20.8x² - 458.3x + 3,500 represents the value of a car from 1964 to 2002. What year did the car have the least value? (x = 0 in 1964)

• 1965

• 1970

• 1975

• 1980

What is the graph of the function f(x) = 4x² - 8x + 7 ?

• A

• B

• C

• D

Tags

CCSS.HSF-IF.C.7A

What is the value of the positive zero of the function, f, defined by f(x) = x² - 121?

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

David has a rectangle and a right triangle. - The length of the rectangle is 5 more than its width, w. - The length of the shorter leg of the triangle is equal to the rectangle’s width. - The length of the longer leg of the triangle is twice the length of the rectangle. Which function, f(w), represents the combined area of the rectangle and the triangle?

• f(w) = 2w² + 10w

• f(w) = 3w² + 15w

• f(w) = w² + 10w + 25

• f(w) = w² + 15w + 50

The function f(t) = -5t²+ 20t + 60 models the approximate height of an object, t seconds after it is launched. How many seconds does it take the object to hit the ground?

Two stores have movies to rent. The first store charges a $12.50-per-month membership fee plus $1.50 per movie rented. The second store has no membership fee but charges $3.50 per movie rented. What is the minimum number of movies a person would need to rent in a month for the first store to be a better deal?

Two functions are shown below. f(x) = 3x + 7 g(x) = 2x + 12 What is the value of ( x ) where the graphs of ( f(x) ) and ( g(x) ) intersect?

• -22

• -5

• 5

• 22

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6