exam Maths Puzzle Numerical Ability

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.

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exam Other Question

1. Find "x" for these 2 problems
a)9^2x=2*(9^x)+3
b)3*(3^x)+9*(3^-x)=28

ive graduated 2years ago and i dont remember how to do those 2 problems
id like to know how to solve them step by step thanks
yours
brian 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