Answer:
Step-by-step explanation:
399*42%= 167.58 the mark up amount
399+167.50=566.50 total
M=1.25
c=0.6
I got this by creating a systems of equations and I used the substitution method
Parallel means lines that never meet, and perpendicular are lines that meet at right angles.
Answer is D subtraction property of equality; multiplication property of equality