3( 2u + 5 ) +3.5u = -1u solve the equation

Can someone me do math because i am having a breakdown rn because i don’t get it

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

How do i find the missing angle measure in a polygon