The price of gasoline on January 1 is g. The price of gasoline rose 15% above the January 1 price. Which expression

represents the new price of gasoline in terms of s?

15s

1.15s

.85s

85s

Answer: 1.15s

Step-by-step explanation: The problem gives the original price as g. I don't see how you can express the higher price in terms of s. It could be that the original price is s, not g. Maybe they made an error. I'm going to use s as the original price. In this case ...

The new price is s plus 15% of s.

s + 15% of s=

= s + 0.15s

= 1.15s

Just remember when a variable does not have a coefficient, the coefficient is 1. So s = 1

And to turn a percentage into a decimal you need to move two places to the left. 15% = 0.15