Answer:
21
Step-by-step explanation:
R=17
5(17-2)=75
5(15)=75
75=75
<span>multiply the first equation by 5 and 2nd by -7 and you get
35x-30y=-5
-35x+28y=-7
now you can cancel out the x's and you get
-2y=-12
so
y=6
now you can just plug y=6 into one of the original equations and you will see that x turns out to be 5
Hope thats okay</span>
Their approximate heating expense would be $1,920. Hope this helps!
For this case we have a function of the form 
, where 
. We must find the values of "and" according to the following function:
So:
Thus, the values are:
24,8, -12
Answer:
24,8, -12
