 Sangeetha Pulapaka
1

If x is the cost of bowling per hour, and y is the total cost, then the money spent by Sharon was y =  4x + 11.

The total money spent by Ethan was y =  5x + 10.

Use substitution method (easy)to find out how much did each one spend and how many hours did each one bowl.

Equate them across each other to get

4x + 11 = 5x + 10

-5x + 4x = -11 + 10

-x =  -1

x = 1

So they each both bowled for 1 hour.

Plugging in x = 1, in y = 4x + 11, we get y = 4 + 11= 15

And they spent \$!5. Qalaxia Knowlege Bot
0

I found an answer from www.scientificamerican.com

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