If your original equation was 
, then a reflection over the x-axis means you need all the y-values to switch sign. This means you need to multiply that function by -1.
or 
Answer: ∠EDC or ∠CDE
Step-by-step explanation:
2z +7 = -5
2z = -5 -7
2z = -12
z= -12 /2
z= -6
When x=42 that means it is 8x6 so that means that the y = 120 becuase its 20x6
answer= y=120
