Whats the greatest common factor of 20 and 40

Ky wants to buy 3 shirts which were originally priced $49.96 each the store will discount the price of the third shirt and then apply a 7.1% tax to a total cost of all three shirts including the tax what will be the mean of the cost show your work

Kevin was watching a DVD that was 125 minutes long. A friend called and he talked to his friend for 15 minutes while the DVD was playing. What percent of the length time of the DVD did he spend talking to his friend on the phone?

Solve ... x/2 = 7

Chloe knows that her kitchen is a rectangle with an area of 168 square feet. If the length of her kitchen is 12 feet, what is its width? What is its perimeter? Show all your work.

What is the standard deviation of the data set? 21 6 18 21 20 14 19 A = 29.3 B=5.0 C=25.1 D=5.4

Geometry express the area of a square with sides of length 5ab as a monomial

Jon wrote the expression shown. -4x+3+5x-1 Write the expression that is equivalent to Jon's using the fewest number of terms possible.

When testing μ, how do we decide whether to use the standard normal distribution or a Student's t distribution? If the x distribution is normal and n ≥ 30 with known σ we use the Student's t.

What is - 90>-5 (k-3) ?

How to simplify the expressions of 5p-5-10-2p