You do that dilation by multiplying every x- and y-coordinate value by 2.5.
<span>F(3)=xx-3x+5
</span><span>F(3)=(3)(3)-3(3)+5
</span><span>F(3)=9-9+5
F(3)=5</span>
Call the numbers x and y. According to the first sentence, xy = 44. You can rearrange to solve for y: y = 44/x. The sum of the numbers, s(x), is x + y, but we just found a way of expressing y in terms of x. Therefore: the sum expressed as a function of one of the numbers (x) is:
s(x) = x + 44/x