Answer:
Step-by-step explanation:
Yes, (-6,-38) is a coordinate pair off the equation
Plug y=7x+4 into your graphic caculator
press 2ND, GRAPH and scroll up to see the point.
x = 70
Since the lines are perpendicular then ∠ AED = 90°, thus
x + 20 = 90 ( subtract 20 from both sides )
