What is done to exponents when you add or subtract powers having the same base?

What is the answer to y=1/2x-3

In six test runs, a truck operated 8, 10, 15, 7, 9, and 11 miles with one gallon of gasoline. at the 95% level of confidence, is this sufficient evidence to show that the truck is operating at a mean rate of about 13.

Write the word form for 3,152,308,726

To 1 significant digit, how much Coumarin (in grams) would a 70 kg (154lb) student have to ingest to reach the LD50?

Yen has 25 dimes she gives the same number of dimes to each of her 5 children how many dimes will each receive?

I am in the 6th grade and I dont know how to get the answer to this problem: Bella is making cranberry juice.

What can go into 40 and in 56 evenly

A, b, c stand for for three different numbers the mean of a andifferent bank is 40 the mean of b and cisco 35a b c=100calculate the valuesame of a, b and c

13/4% as fraction and decimal

For the past 7 years, George and Sue have deposited $10,000 in a retirement account with a simple interest rate of 4%. They plan to continue to make annual deposits for the next 15 years. Explain how their money will grow over time.