Answer:

Let d1 be the diameter of the moon and d2 and be the diameter of the earth.Let r1 be the radius of the moon and r2 be the radius of the earth.

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Answer:
Step-by-step explanation:
Answer and work down below. Let me know if you have questions
Answer: 1
Step-by-step explanation: You are starting with (a, b)
(a, -5) means that when b is -5, a is a
So substitute-5 into the equation for b and solve for a
3a = -2b - 7
3a = -2(-5) - 7
3a = 10 - 7
3a = 3
a = 1