30 is 40% of what number? *

Find the roots of the equation below. x^2 - 6 + 9 = 0

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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