Book Maths Puzzle Algebra

Graph the following equations

y=2x-3

x+2y=4

1/2x+2=y

y=x(squared)-5

x=1-y(squard)

x=y(squard)+2

2x+3y=0
y=9-x (squard)

y=square root of x-4

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Book Other Question

A young man spent 1/4 of his allowance on a movie. He spent 11/18 of the remainder on after-school snacks. Then from the money remaining, he spent $3.00 on a magazine, which left high school graduating class is made up of 466 students. There are 212 more girls than boys. How many boys are in the class?