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9. option D ---> (3, -5)

10. option D ---> E = 4.5H + 35

Step-by-step explanation:

9. According to the rule of reflecting across the y-axis :-

(x, y) ---> (-x, y)

(-3, -5) ---> (3, -5)

3 was already a negative, so we would flip the signs making it positive and keeping -5 as it is.

10. When we read the questions it gives us some information that is useful to form an equation.

Now we can put all of the information into an equation.

E = 4.5H + 35

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4.6875 pounds

step-by-step explanation:

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