-578/100 - 9/13 as a equvlent expression

Jessica is a custodian at oracle arena.she waxes 20 m2 of the floor in 3/5 of an hour. jessica waxes the floor at a constant rate.at this rate how many sqaures meters can she wax per hour

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

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