The very smart owner of a lemonade stand has
determined that the profits P
of the stand are approximately
given by
P(x) = -x2 +150x + 50
where x is the number of
lemonades sold daily. Find the
maximum profit to the nearest
dollar.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.