Given the system of equations below,explain if (6,-9) is a solution or not.
1 answer:
Answer:
(6,-9) is a solution.
Step-by-step explanation:
Multiply each equation by the value that makes the coefficients of y opposite.
(-1) · (7x+2y) = (-1) · (24)
8x+2y = 30
Simplify.
-7x-2y = -24
8x+2y = 30
x = 6
-7 · x - 2y = -24
-7 · 6 - 2y = -24
-42 - 2y = -24
-2y = 18
y = -9
You might be interested in
.712 rounds to .7
.665 rounds to .7
.545 rounds to .5
30% percent is what they marked up
Answer:
y =8
Step-by-step explanation:
Answer:
$56.41
Step-by-step explanation:
You have to divide the total bill by the sales tax and the multiply that number by 100. Then subtract that number from the total bill and that's how you get your answer.
