Use the associative property of addition to rewrite (12+3)+7. Which expression is equivalent?

A. 12(3 + 7)

B. (5 + 5 + 3) + 7

C. (12 - 3) + 7

D. 12 + (3 + 7)

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

Find the value of x for which the lines are parallel.

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin