Verify

cos^4x-sin^4x=cos2x

Pilar bought 2/3 pound of turkey. She ate 1/4 of the turkey for lunch. How many pounds of turkey did she eat?

If 4/x=-5 what is the valur of 7x

I would appreciate a step by step explanation because I can't solve it. Solve for X: 35/45 + x/18 = 8/9

A circular above ground pool has a height of 52 inches, and a volume of 1100 ft^3. What is the radius of the pool to the nearest tenth of a foot? Use the equation V=pi*r^2*h. (V = volume, r = radius, and h=height)

Find two integers whose sum is - 7 ans whose product is 12. Explain how you found the numbers.

the total cost of a pair of shoes is $85.86. What was the cost of the shoes before the 8% sales tax was added?

The sum of two numbers is fifteen. One number is three less than the other. Find the numbers.

Which values for x and y make the statement, (x+4) (y-1) = 0, true? A) x = - 4, y = 1 B) x = - 4, y = - 1 C) x = 4, y = 1 D) x = 4, y = - 1

High Street dog 28 of your muffins that was 7 out of 10 of all of them how many are left

Which numbers below represents a repeating decimal? -2/3, - 3/5, 3/10, 11/20