Answer:

Step-by-step explanation:
This is your equation, right? Just checking
y=4x+2. eq1
y=5x. eq2
4x=2-y
x=(2-y) /4
substitute in equation 2
y=5(2-y) /2
y=(10-5y)/2
4y=10-5y
9y=10
y=10/9
substitute in equation 2 or 1
substituting in equation 2
10/9=5x
x=10/45
x=10/45 y=10/9
you can verify it also.
HOPE IT HELPS!!
D
4x - 2 = 10; 3
4(3) - 2 = 10
12 - 2 = 10
10 = 10
Answer:
Quantities that stay the same are shipping and handling
Quantities that change are the amount he pays for each book
I would say the shipping and handling fees are the dependent and the amount for the books is independent
Step-by-step explanation:
It is B because it can’t be A and it can’t be C and it can’t be D so my answer is B