Simplify each expression 2m+6(2/3-m);m=4

Which best explains why this triangle is or is not a right triangle?

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

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