How do i use the properties of equality

Ron walks 0.5 mile on the track in 10 minutes. Stevie walks. 025 mile on the track in 6 minutes. Find the unit rate for each walker in miles per hour. Who is the faster walker?

In a lottery the first prize is $1,000,000. Each succeeding prize is 1/2 of the preceding prize. How much money is allotted in 7 prizes?

Which class has 40% girls? Class A: 40 out of 110 Class B: 100 out of 140 Class C: 48 out of 120 Class D: 42 out of 100

A research firm conducts a sample survey and discovers that, of all the new watchers of three-dimensional tv, 77% have not reported any side effects such as vertigo, headache, or undue eyestrain compared with watching regular television.

That he had $40 in her pocket she bought 12 identical bags of popcorn that he was left with $10 after buying the popcorn what was the price in dollars each bag of popcorn

What is 27 x 17? I really need to know.

What is the factored form of the trinomial x^2 + 11x + 28 = 0? (x + 3) (x + 8) (x + 4) (x + 7) (x + 7) (X + 8)

What is 4,278,003 rounded to the nearest 10,000?

List the factors of 48 and 54

How does an indirect proof different from a regular proof