Why is it important to simplify rational expressions before multiplying or dividing? How do you determine that a rational expression is in simplest form?​

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

Pam buys a sleeve of ball bearings for her skateboard. each of the bearings is 1 1/5 inches wide. the sleeve is 9 3/5 inches long. how many ball bearings are in the sleeve? show your work.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.