Ive got 3 questions about equations that are below, Im not very good with equations but im hoping one of you guys can show me how to work it out.
1. F = MV - MU divided by T / Find F when M = 2, U =4, V = 7, T =3
Given that y = x2 + 3x - 5, find y when x = 4
2. Bag of Kitty Litter : £2.20 per bag + £3 postage
Let N be the number of kitty bags that Jenny buys.
Write down an equation to represent the amount, £=A, that jenny will pay for N bags of cat litter by mail order
3. The area of a rectangle has the same numerical value as the perimeter of the square, By forming an equation in X, find the length of the rectangle.
(x + 4) cm
I really hope one of you guys can help as im stumped.