7^(4) x 7^(-8) x 7

rewrite the expression using the base only once.

Which expression is equivalent to? assume x > 0 and y > 0.

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?