Martha took a test with 45 questions. she got 85% correct. how many did she get right

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

What percent of the circle below is shaded?

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices