How to find the spread in math?

Is 4^7x4^-5 equivalent to 4^-35

For every 4 boys who liked soccer, there were 8 boys who liked basketball. for every 2 girls who liked soccer, there were 10 girls who liked basketball.

In a sequence, the first term is 8 and the common difference is - 5. The fifth term in this sequence is

How can you multiply a fraction

Prove that the first player has a winning strategy in the game of Chomp if the initial board is two squares wide, that is, a 2 * n board. (See textbook for hint and for explanation of the game of Chomp.)

The sum of positive integers x and y is 246, and x/y = 5. What is the value of y?

Where do martians leave thier spaceships

How to find the zeros of f (x) = - 2x^2+8x

The sum of the measures of two exterior angles is 252. what is the measure of the third exterior angle?

Martin finds a shirt on sale for 10% off at a department store. The original price was 20$. Martin must also pay 8.5% sales tax. How much is the shirt before taxes are applied? How much is the shirt after tax is applied?