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what is the mean of variable a?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

Question 3 (essay worth 10 points) (03.06 mc) part a: max rented a motorbike at $465 for 5 days. if he rents the same motorbike for a week, he has to pay a total rent of $625. write an equation in the standard form to represent the total rent (y) that max has to pay for renting the motorbike for x days. (4 points) part b: write the equation obtained in part a using function notation. (2 points) part c: describe the steps to graph the equation obtained above on the coordinate axes. mention the labels on the axes and the intervals. (4 points)