Determine if the lines are parallel, perpendicular or neither:
1. x + 4 = y and y – x = -3
2. y = 4x + 3 and 4y + x = -1
3. y + 3 = 6x and -6x – y = 2
4. 2x + 6y = -3 and 12y = 4x + 20
5. 3x – 4 = y and y – 3x = 8

(-5,-28)

i graphed to on desmos.

i believe the answer is c.

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: