Evaluate each of the numerical expressions below. 1. 42 +9
2. (5 + 8)
PLEASE HELP ITS DO RN

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

X+ y = 5 ; x - y =3 solve using linear combination

The suare root of 9x plus 7 plus the square rot of 2x equall to 7