Advanced Math practice question

Answer: 40

h(2) = 30(2) − 5(2²) = 60 − 20 = 40 meters.

Common wrong answers

If you answered 20

20 is the subtracted 5t² term; the height is 60 − 20 = 40.

If you answered 50

5t² at t = 2 is 5 · 4 = 20, not 10.

If you answered 60

60 is only the 30t part; subtract 5t² = 20.

More Advanced Math questions

• Easy
  If f(x) = 3x − 7, what is the value of f(5)?
• Easy
  What are the solutions to x² − 9 = 0?
• Easy
  Which of the following expressions is equivalent to x² + 7x + 12 ?
• Easy
  The function g is defined by g(x) = x³ + 2x. What is the value of g(−2) ?
• Easy
  For x > 0, which of the following is equivalent to ∛(x⁵) ?
• Easy
  The function h is defined by h(x) = (x − 6)(x + 2). What is one value of x for which h(x) = 0 ?