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solong [7]
3 years ago
5

What’s the value of f(5)?

Mathematics
2 answers:
devlian [24]3 years ago
8 0

Answer:

f(5) = 25

Step-by-step explanation:

f(x) = 3x + 10

f(5) = 3(5) + 10

f(5) = 15 + 10

f(5) = 25

AnnZ [28]3 years ago
8 0

Answer:

f(5) = 25

Step-by-step explanation:

f(x) = 3x + 10

Let x = 5

f(5) = 3*5+10

      = 15+10

      = 25

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Vladimir79 [104]

Answer:

I think the answer is 5

Step-by-step explanation:

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Determine whether the graph represents a proportional relationship. A graph is shown. The x-axis is labeled from 0 to 9. The y-a
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3 years ago
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) f) 1 + cot²a = cosec²a​
notsponge [240]

Answer:

It is an identity, proved below.

Step-by-step explanation:

I assume you want to prove the identity. There are several ways to prove the identity but here I will prove using one of method.

First, we have to know what cot and cosec are. They both are the reciprocal of sin (cosec) and tan (cot).

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Therefore:

\displaystyle \large{1+\frac{1}{(\frac{\sin x}{\cos x})^2}=\frac{1}{\sin^2x}}\\\displaystyle \large{1+\frac{1}{\frac{\sin^2x}{\cos^2x}}=\frac{1}{\sin^2x}}\\\displaystyle \large{1+\frac{\cos^2x}{\sin^2x}=\frac{1}{\sin^2x}}

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\displaystyle \large{\sin^2x+\cos^2x=1}

Therefore:

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Hence proved, this is proof by using identity helping to find the specific identity.

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