Factorize:
3xy - x
4a (to the power of 2) -9
(x-y) to the power of 2 - x+y

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?