E equation (x+ 7)(x-9) = 25

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Find the perimeter of the figure shown above. a. 40 cm c. 52 cm b. 60 cm d. 75 cm select the best answer from the choices provided

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