Which property would allow you to use mental computation to simplify the problem 23 + (7 + 9)? associative property of addition distributive property additive identity additive inverse

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Are the corresponding angles congruent? explain why or why not.

Reading tests are compared for two students. sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her reading test. lee got 97, 67, 89, 99, 100, 45, 79, 89, 58, and 67 on his reading test.