Mastering Function Outputs and Unknowns in Algebra

A function f(x) represents the cost in dollars of x pounds of apples. If f(3) = 6, what is the cost per pound of apples?

• 4 dollars per pound

• 3 dollars per pound

• 2 dollars per pound

• 1 dollar per pound

The function g(t) = 2t + 5 describes the total distance in miles traveled after t hours. How far will you travel after 4 hours?

• 20 miles

• 15 miles

• 13 miles

• 10 miles

If h(x) = 3x - 7, what is the value of h(5)?

• 0

• -2

• 10

• 8

A function p(n) = n^2 + 2n represents the total number of items produced after n days. How many items are produced after 3 days?

• 10

• 20

• 5

• 15

The function r(d) = 50 - 2d gives the remaining amount of gas in a tank after d days. If you have 30 gallons left, how many days have passed?

• 15

• 5

• 10

• 20

If s(x) = 4x + 1, what is the output when x = 6?

• 30

• 25

• 20

• 24

The function t(m) = 5m - 10 represents the profit in dollars from selling m items. If the profit is $15, how many items were sold?

• 10

• 5

• 3

• 7

A function q(y) = y/2 + 3 describes the temperature in degrees Celsius. What is the temperature when y = 10?

• 5 degrees Celsius

• 12 degrees Celsius

• 15 degrees Celsius

• 8 degrees Celsius

If v(z) = z^2 - 4z + 4, what is v(2)?

• 2

• 4

• -2

• 0

The function w(a) = 7a + 3 represents the total cost in dollars for a number of items a. If the total cost is $38, how many items were purchased?

• 5

• 7

• 4

• 6