Factor the expression below.
x2 - 18x+81
o a. (x - 3)(x - 27)
o b. (x+9)(x+9)
o c. (x+3)(x+ 27)
o d. (x - 9)(x-9)

You must remember that a polynomial is written like so...

ax^2 + bx + c

In this case...

a = 1

b = -18

c = 81

To factor you must find two numbers who both add up to b (-18) AND multiply to c (81)

-9 + -9 = -18

-9 * -9 = 81

so...

D. (x - 9)(x - 9)

Hope this helped!

~Just a girl in love with Shawn Mendes

what does x eaqual

step-by-step explanation:

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: