Set up an equation for both Sarah and Joe.
Sarah's equation would be 59+19.50x=y
Joe's Equation would be 149+9.50x=y
The goal is to get y to equal the lowest number. If we plug in 1 for x for both equations we get:
59+19.50(1)=y for sarah and Joes would be 149+9.50(1)=y.
Sarah would pay $78.50 for her 1st month and Joe would pay $158.5 for his 1st month. Sarah pays much less than joe but over a few months Sarah would pay more eventually. Hope I helped and if you have any questions, just leave a comment.
I'll help out. There are seven kittens so 7 and they all weight less than 3.5 ounces. Try 7x3.5. That is 24.5. There's a possible value. 24.5 ounces. :)
(7x3.5=24.5oz)