Explain why knowing the height is needed when finding the perimeter of a right triangle

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

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 difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.