Hello, I need help solving the system of equations by substitution method.
2 answers:
4x + 2y = 108
x = -5y
4(-5y) + 2y = 108
-20y + 2y = 108
<u>-18x</u> = <u>108</u>
-18 -18
x = 6
4(6) + 2y = 108
24 + 2y = 108
<u>- 24 - 24</u>
<u>2y</u> = <u>84</u>
2 2
y = 41
(x, y) = (6, 41)
4(-5y) + 2y = 180
-20y + 2y = 180
-18y = 180
y = -10
x = 50
You might be interested in
10) 7(2m+3)
11) 3(3r-1)
12) 2p(5q+4)
Answer:
I really don't know lol
Step-by-step explanation:
Can you mark me brainliest please :p
25+15•3= 70 dollars she spent on the hair salon..... dang lotsa money
Answer:
If the slope is positive it is increasing if the slope is negative it is decreasing :)
Example:
Y=mX+b
If m is positive it is a positive slope
The answer is C 252 rate of change
