A raincoat is on sale for 30% off. Four students write equations to represents the relationship between p, the original price of the raincoat, and s, the sale price. Which of
these equations are correct?
• John's equation: S+0.3s =p
Elaine's equation: P-0.3p = S
• Marty's equation: p= 8 +0.7
+
А
John's equation only
B Elaine's equation only
c Elaine's equation and Marty's equation
D
All three equations