Solve the system of equations. y = 2x y = x 2 – 15

a. (–3, –6) and (–5, –10)

b. (3, 6) and (–5, –10)

c. (3, 6) and (5, 10)

d. (–3, –6) and (5, 10)

D. (–3, –6) and (5, 10)

Step-by-step explanation:

The system has equations:

...(1)

and

...(2)

Equate both equations;

Rewrite in standard form:

We factor to obtain:

By the zero product principle;

When x=-3, y=2(-3)=-6

This yields the ordered pair (-3,-6).

When x=5, y=2(5)=10

This yields the ordered pair (5,10).

The correct choice is D.

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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