Find the corret measure of 6

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

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

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