4x-1=3(x-1) Please help!

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

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

If y varies directly as x2 and y=6 when x=6, find the constant of variation.