Tonya is twice kevin's age. in three years, tonya will be 17. and in another three years, uncle rob will be three times tonya's age.
today kevin is years old , and uncle rob is years old.

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Arational number that is equivalent to -20/4?

Rena used the steps below to evaluate the expression , when . step 1: substitute into the expression. step 2: simplify the parentheses. step 3: evaluate the power to a power. step 4: use reciprocals and find the value. in which step did rena make the first error?