Let: eq 1:2x+5y=-55
eq 2:y=3x+6
by substituting eq 2 in eq 1 we get,
2x+5(3x+6)=-55
2x+15x+30+55=0
17x + 85=0
x=-85/17
x=-5
By substituting x value in eq 2,
we have,
y=3(-5)+6=-15+6=-9
Answer:

Step-by-step explanation:
We have given integral 

, here
and 
Now first integrate 
So 
Integrating by part



So
Step-by-step explanation:
15 dollar for each
15*70*12
then 84*70
total amount. the above
Answer:
A
Step-by-step explanation:
Answer:
6)C,120
7)B,60°
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