The local YMCA charges a $79 membership fee and $42.50 per month. Allison has a coupon that will allow her to join the club for $298 for 6 months. How much will Allison save if she uses the coupon?

She will save $36 if she uses the coupon.

Step-by-step explanation:

First, find out how much it costs for 6 months without the coupon. You can use the equation 42.50x + 79. Since you need to know the cost of 6 months, plug a 6 into where the variable 6 is to get 42.50(6) + 79. 42.50 x 6 = 255. 255+79 = 334. So, it costs $334 for 6 months. Now, find the difference. Subtract 334 by 298. That equals 36. So she will save $36 if she uses the coupon.

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80