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Find the three arithmetic means between -5 and -25.

a. -10, -15, -20
b. -9, -15, -19
c. -8, -14, -23
d. -10, -20, -24

Would like this ASAP! Thank you!!! :)

User Monical
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1 Answer

3 votes
Arithmetic sequence is -5, x, y, z, -25
Now, a = -5
a(n) = a + (n - 1)d
a(5) = -5 + (5 -1)d
a(5) = -5 + 4d = -25
4d = -25 + 5
d = -20/4
d = -5

So, a(2) = -5-5 = -10
a(3) = -10-5 = -15
a(4) = -15-5 = -20

Your Sequence is -5. -10, -15, -20, -25

In short, Your Answer would be Option A

Hope this helps!
User Jan Matousek
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5.6k points