Digital SAT Math Practice Flashcards

A store sells a jacket originally priced at $80 at a 25% discount. What is the sale price?

Answer: $60

A 25% discount on $80 is $20 off, making the sale price $80 − $20 = $60.

Which expression is equivalent to (x + 3)² − (x − 3)²?

Answer: 12x

Expanding: (x² + 6x + 9) − (x² − 6x + 9) = 12x.

Line ℓ passes through (−1, 2) and (3, 10). What is its slope?

Answer: 2

Slope = (10 − 2)/(3 − (−1)) = 8/4 = 2.

A cylinder has a base radius of 3 and a height of 8. What is its volume?

Answer: 72π

V = πr²h = π(9)(8) = 72π.

The graph of y = a(x − h)² + k is a parabola with vertex at (−3, 5) that opens downward. Which set of values is correct?

Answer: h = −3, k = 5, a < 0

The vertex form places h and k directly from the vertex (−3, 5); a < 0 for a downward parabola.

A data set has values {4, 7, 7, 9, 13}. What is the median?

Answer: 7

Arranged in order, the middle value of the five-number set is the third value, which is 7.

sin(60°) equals which of the following?

Answer: √3/2

From the unit circle, sin(60°) = √3/2.