2 years ago

A(n)=−5+6(n−1) What is the 12th term in the sequence

Mathematics

1 answer:

barxatty [35]2 years ago

4 0

Answer:

n/2[2a+(n-1)d]

12/2[2(-5)+(12-1)6]

66-10=56×6=336

336 is the 12th term

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In the figure attached you can see two right triangles triangle ABD and a triangle ACD.

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3 years ago

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This is the method you should take with unit conversions in general, just set up fractions so the units cancel out, like the 7.5 feet cancels out with the feet in the 1/5280 so miles is left on top.

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3 years ago