exam Maths Puzzle Numerical Ability

Right now,Im working on a area of shapes in my math,Im not sure how to draw so anyone can see this,so Im going to try another way.

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Round to nearest whole number,Use 3.14

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exam Other Question
Alice sells lamps at craft fairs. she uses the function F(x)=25x-250 to project her profit for selling x lamps. How would I graph this function and identify the slope and y-intercept. Can someone help me on this problem?

I need to find values for m and b in the following system so that the solution to the system is (-3, 4).

5x + 7y = b
mx + y = 22

Thanks so much,
Sher