I'd suggest re-wording your question:
"How do I find the ordered pair (x,y) that solves this system of linear equations?"
One way of doing that would be to substitute y=5x+7 into the other equation:
-3x - 2(5x+7) = -12.  Solve this for x.  Once you have a value for x, subst. that value into y=5x+7 to find the corresponding y value.
Then write the ordered pair (x,y).  That's it.
        
             
        
        
        
M<1 = 1/2(83 - 29)
Therefore, m<1 = 27 degrees.
Hope this helps!
        
                    
             
        
        
        
<span>The fittable function seems to be 2 x^2+4 x+7.
So C (167)</span>
        
             
        
        
        
Answer:
$899.15
0.85(1199) - 120
Step-by-step explanation:
To find the purchase total, multiply the price by the percent paid and subtract the certificate.
The store offers a 15% discount. This means you pay 85% of the price. So the discounted price is 0.85(1199) = 1019.15
Subtract the certificate 1019.15 - 120 = 899.15
The composite function is 0.85(1199) - 120.