Verify

cos^4x-sin^4x=cos2x

Norah overdue her account to buy $35. She then quickly deposited her babysitting money of $25. What is the current balance on the account?

What is the following difference? 2 a b (RootIndex 3 StartRoot 192 a b squared EndRoot) minus 5 (RootIndex 3 StartRoot 81 a Superscript 4 Baseline b Superscript 5 Baseline EndRoot)

How to convert rational numbers to decimals?

Order from least to greatest 4.5 3.9 4.258 3.75 4.256

What is the standard form of the equation x^2 - 6x=7

How does a rectangle turn into a trapizode

This season, the probability that the Yankees will win a game is 0.59 and the probability that the Yankees will score 5 or more runs in a game is 0.45. The probability that the Yankees lose and score fewer than 5 runs is 0.33.

In a high school the ratio of make to female is 8:5, when 400 senior males are removed and 300 senior females are removed, the ratio is 8:3. the number of students in the whole school is?

The 5th graders were given sandwiches for lunch during their field trip. Nathan at 5/6 of his sandwich, Leroy ate 7/8 of his sandwich, and Sofia ate 5/8. Who ate the greatest amount of their sandwich?

7. A rectangular play area is to be bounded by 120 m of fencing. Determine the maximum area and the dimensions of this rectangle.