20^2-12^2=x^2
400-144=x^2
256=x^2
x=16
we have been asked to perform 
The given expression can be written as

Now it can be re-written as below

I bake 45 cupcakes everyday and every hour I sell 5 cupcakes.
Answer:
27
Step-by-step explanation:
First, we need to find x. We are given the perimeter, which is 2l + 2w, so from there, we have an equation of 2(4x-1) + 2(3x+2) = 100. By working through it, we get that x = 7. We're asked to find WX, so plug 7 into 4x - 1 and get 27.
Answer:
the minimum value of product is -8
Step-by-step explanation:
We have been given the function y = 2x-8 and we have to find the minimum value of the xy.
Plugging the value of y in the product

f(x) represents a upward parabola and we know that for a upward parabola, the minimum point is the vertex.
So in order to find the minimum value we find the y coordinate of the vertex of the parabola.
x-coordinate of the parabola is given by

y -coordinate of the parabola is

Hence, the vertex is (2,-8)
Therefore, the minimum value of product is -8