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3 years ago

Which number (s) below represents a repeating decimal? -2/5, -7, 3/7, 11/12

Mathematics

2 answers:

Ray Of Light [21]3 years ago

6 0

Step-by-step explanation: Arrange the terms in ascending order: -7, -2/5, 3/9, 11/12.

Hope this helps! :D

-TanqR

yulyashka [42]3 years ago

4 0

Answer:

3/9

Step-by-step explanation:

A repeating decimal is a decimal in which the last number is the same forever. (Ex. .83333333333333333)

So...

2/5 = .4 Not Repeating

-7 = -7 Just a regular integer so nothing can actually repeat

3/9 = .33333 Yes. the 3 is repeating.

11/12 = 0.916666667 Repeated BUT it ends in 7, it doesn't keep continuing.

Hope this helped :)

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Answer: a = -2 and c = 7

Step-by-step explanation:

(this answer uses some basic calculus)

We know that $f'(x) = 2ax + 4$ , and since $(1,9)$ is a maximum of $f$ , then $f'(1) = 0$ . That means $2a + 4 = 0$ , so $\boxed{a = -2}$ . Then since $f(1) = 9$ , we have $-2(1)^2 + 4(1) + c = 9$ , so $\boxed{c = 7}$ .

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