Cos2a = 2cos^2a-1 for all values of a

true or false?

In triangle ABC, the length of side AB is 10 inches and the length of side BC is 15 inches. Which of the following could be the length of side AC? A. 3 inches B. 30 inches C. 27 inches D. 10 inches

The square of a number is 12 less than 7 times the number. What is the number? - 4 or - 3 - 4 or 3 - 3 or 4 3 or 4

Solve the equation for y. 2x + 5y = 5 y=x + 1 y = - 10% + 25 y=22+1 y=x + 5

90 degrees + 60 degrees + x degrees=

What is the correct factorization of 6 (x - 2) + y (x - 2) ?

The smallest hummingbird is the Bee hummingbird. It has a mass of about 1 1 4 grams. The mass of a larger type of hummingbird is about 5 times the mass of the Bee hummingbird. What is the mass of the larger hummingbird?

How long would it take to travel 200 meters at 5 m/s

Type your answer in decimal form. Do not round. 7 days = a0 hours

If you multiply two decimals that are less than 1, can you predict whether the product will be less than or greater than either of the factors?

Jessie and Mia are playing the integer card game. The cards in Jessie's hand are 3, - 5, 9 and - 6. What is the total score of Jessie's hand?