Sydney was asked whether the following equation is an identity: (2x^2-18) (x+3) (x-3) = 2x^4-36x^2+162

At 1:00, the minute and hour hands form a 30º angle. What is the measure of the angle at 4:00, in degrees?

If lines m and n are parallel, and 8 measures 130o, which is the measure of 1? A) 50o B) 90o C) 130o D) 180o

Dina and Masha started out on a 20 miles bike path at the same time. When Dina reached the end of the 20 miles, Masha still had 4 miles left to bike. If Dina's biking speed was 10 mph, find Masha's biking speed.

In a statistics class there are 18 juniors and 10 seniors; 6 of the seniors are females and 12 of the juniors are males. If a student is selected at random, find the probability of selecting the following. a. A junior or a female b.

What is the simplified form of expression? 5 (14 - 2) to the 2nd power over 2

Which is a correct way of evaluating the expression 15x + 30x for x = 2?.

Ms. Katz paid $50 for a used bicycle and then sold it to her neighbor for $60. She decided to buy it back, but she had to pay $70 for it.

9/4 as a mixed fraction

Gordon was thinking of a number. Gordon doubles it and gets an answer of 90.8. What was the original number?

64.84 to the nearest whole number