Answer:
A = 100 B = 130 C = 150
Step-by-step explanation:
Translated into a system of equations:
A+B+C = 380
B = A+30
C = B + 20
So we find B from the last one:
B = C-20
Plug it in the second one:
C-20 = A+30
A = C-50
Plug it in the first:
C-50 + C-20 + C = 380
3C - 70 = 380
3C = 450
C=150
A = C - 50 = 150 - 50 = 100
B = C - 20 = 150 - 20 = 130
Answer:
$475.20
Step-by-step explanation:
all step by step procedure is available in picture below.
Given:
A = charges 9.95 per month for the first 10 hours and 1.69 per hour for all those over 10 hours.
B = charges a flat fee of 19.95
A = 9.95 + 1.69(x-10) where x is the total number of hours used.
B = 19.95
A = B
9.95 + 1.69(x - 10) = 19.95
1.69x - 16.9 = 19.95 - 9.95
1.69x = 10 + 16.9
1.69x = 26.9
x = 26.9/1.69
x = 15.92 hours
If usage does not go over 10 hours, it is cheaper to use A.
<em />If usage is between 15-16 hours, A or B is acceptable. They cost almost the same.
If usage is beyond 16 hours, it is cheaper to use B.
Answer:
-6x - 33
Step-by-step explanation:
distribute -4 into 2x + 6 and then combine like terms
There should be a question to answer