Why are angles opposite each other when two lines cross called vertical angles?

A ball is thrown downward from the top of a building with an initial speed of 25m/s. it strikes the ground after 2.0s. how high is the building?

How do i divide decimals by whole numbers

A shoe factory produces 345 pairs of shoes in one week and 354 pairs the next week. if 673 pairs were delivered to a department store, how many pairs were not delivered?

At school there are the same number of boys and girls. A student is chosen at random to raise the flag. How many times is it expected that a boy will raise the flag over 42 days of school

Red short-horned cattle are homozygous for the red allele, white cattle are homozygous for the white allele, and roan cattle are heterozygotes. Population A consists of 36% red, 16% white, and 48% roan cattle. What are the allele frequencies?

Whats 300 times 400? then add 500

Tina's swimming lesson started at 5:30 P. M. and ended at 6:25 P. M. How long did the swimming lesson last?

Solve - 1/2x>8 graph solution

Michale is traveling from San Francisco to Houston this morning. The flight will take 4 3/10 hours to complete. If the airplane travels 368.8 miles per hour, how many miles will the airplane travel? Explain

What is the correct first step to solving the equation x^2=10-3x