Answer:
X = 9 months
Step-by-step explanation:
To solve the number of months when the cost of each payment
are the same, you should equate the two cost. First establish the equations
Let A be the cost of first payment method
B is the cost of the second payment method
X is the number of months
A = 38x + 15
B = 31x + 78
38x + 15 = 31x + 78
7x = 63
X = 9 months
Answer: 
Step-by-step explanation:
Given

GCF or HCF of the two is the highest common factor

It is clear GCF is 
Answer:
Line
Step-by-step explanation:
Planes intersect along a line.
Answer:
7 groups
Step-by-step explanation:
Each group would have 1 blue marble and 3 green marbles
Answer:
D 6 seconds
Step-by-step explanation:
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