ACT Prep #1

The length, in inches, of a box is 3 inches less than twice its width, in inches. Which of the following gives the length, l inches, in terms of the width, w inches, of the box?

• l = w + 3

• l = undefined w + 3

• l = 2w – 3

• l = 2w + 3

• l =  w – 3

What is the greatest common factor of 42, 126, and 210 ?

• 2

• 6

• 14

• 210

• 42

How many irrational numbers are there between 1 and 6 ?

• 3

• 10

• 1

• 4

• infinitely many

A rectangle with a perimeter of 30 centimeters is twice as long as it is wide. What is the area of the rectangle in square centimeters?

• 15

• 25

• 50

• 100

• 125

(x³)⁹=

• x¹²
• x²⁷
• x³
• x⁶

Answer explanation

Power rule... MULTIPLY exponents!

Which of the following is the sine of angle A in the right triangle below?

• 5\13

• 5\12

• 12\13

• 12\5

Answer explanation

SOH CAH TOA!

SOH = opp/hyp based on angle A