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3 years ago

If f(n)=(n-1)2+

"f(n) = (n -1)2 + 3n" alt="f(n) = (n -1)2 + 3n" align="absmiddle" class="latex-formula">

Mathematics

1 answer:

Liono4ka [1.6K]3 years ago

8 0

Distribute the 2 first.

f(n) = 2n - 2 + 3n

Combine like terms.

f(n) = 5n - 2

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Rewrite 9cos 4x in terms of cos x.

rosijanka [135]

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as far as the previous one on the 2tan(3x)

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$\bf 2\left[ \cfrac{2tan(x)+tan(x)-tan^3(x)}{1-tan^2(x)}\cdot \cfrac{1-tan^2(x)}{1-tan(x)-2tan^3(x)} \right]
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3 years ago

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kondor19780726 [428]

Angle D is equal to Angle B because AB and DE are parallel to each other.

AD is a straight line so the (2) 2x angles and 72 degrees need to equal 180.

Setting up the equation you have:

2x + 2x + 72 = 180

Simplify:

4x + 72 = 180

Subtract 72 from each side:

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3 years ago

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IceJOKER [234]

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2 years ago

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Sphinxa [80]

Answer:

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gladu [14]

Answer:

A) 9 and 15.

Step-by-step explanation:

First, let's see what each number's factor is:

9 : 1, 3 & 9

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12 : 1, 2, 3, 4, 6 & 12

Therefore, The number 3 is a common factor of A) 9 and 15.

___

7 0

2 years ago