Which expression is equivalent to t^2 + 36? (t^2 = t to the second power)

What is the minimum of y=4x^2-8x+7? (4x^2 = 4 times x to the second power)

The function f(t)=-5t^2 + 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?

Suppose the function f(x) = 2x + 12 represents the cost to rent x movies a month from an internet movie club. Sarah now has $10. How many more dollars does Sarah need to rent 7 movies next month?

Solve for m in the equation E = mc^2

Suppose the equation V = 20.8x^2 - 458.3x + 3500 represents the value of a car from 1964 to 2002. What year did the care have the least value? (x = 0 in 1964)

Cell phone Company Y charges a $10 start-up fee plus $0.10 per minute, x. Cell phone Company Z charges $0.20 per minute, x, with no start up fee. Which function represents the difference in the cost between Company Y and Company Z?

Solve the system. y=5x + 5 and y=15x - 1

Find the solution to the system. y=3/2x and 6x - 4y=1

Suppose a video store charges nonmember $4 to rent each video. A store membership costs $21 and members pay only $2.50 to rent each video. For what number of videos is the cost the same?

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