Answer: 
Step-by-step explanation:
1) Reorder the terms: 

2) Solving: 
3) Add -34 to each side of the equation: 
4) Combine like terms: 34 + -34 = 0: 

5) Combine like terms: 47 + -34 = 13: 
6) Divide each side by -10: 
13/28+17/20=−13/28+17/20=27/70
C because the parabola opens down and the vertex is equal to or less than 4.