Use elimination to solve the system of equations

A (-5,2)

Step-by-step explanation:

5x+y=-23

7x-3y=-41

3×(5x+y)=3×(-23)

15x+3y=-69

+7x-3y=-41

22x=-110

22. 22

x=-5

5x+y=-23

5(-5)+y=-23

-25+y=-23

+25. +25

y=2

When using elimination you add both equations together so that one variable cancels out the other. In this situation, y can be the variable. You must get the y-variables to cancel out leaving just the x- variables to solve for.

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

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: