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Studentka2010 [4]
3 years ago
15

Evaluate the function rule for the given value. f(x) = 3x for x = –5

Mathematics
2 answers:
Vikentia [17]3 years ago
7 0

Answer:

  f(-5) = -15

Step-by-step explanation:

Put the value where x is and do the arithmetic.

  f(-5) = 3(-5) = -15

The value of f(-5) is -15.

ra1l [238]3 years ago
6 0
Answer: f(-5)=-15

Knowing that x=-5, let’s substitute that into everywhere we see x in the equation

f(x)=3x

f(-5)=3(-5)

Now let’s solve that

f(-5)=-15

Hope this helps comment below for more questions :)
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9) PLS HELP W/QUESTIOOOON ASAP!!!:)<br><br> BRAINLIEST AND 10 + POINTS
pav-90 [236]
Answer: -8

Explanation: so f(g(-1)) basically means f of g of -1. so we plug in -1 for x in g(x) and that equals 2(-1) + 5. so g(x) = 3. now we have f(3) because it’s f(g(-1)). f(3) = 1 - 3^2, which equals -8.

hope this helps!
5 0
3 years ago
Read 2 more answers
Cos (90-theta) • cosec90-theta) =tano. How?​
denis-greek [22]

Answer:

<u>______________________________________________________</u>

<u>TRIGONOMETRY IDENTITIES TO BE USED IN THE QUESTION :-</u>

For any right angled triangle with one angle α ,

  • \cos (90 - \alpha  ) = \sin \alpha  or  \sin(90 - \alpha ) = \cos\alpha
  • cosec \: (90 - \alpha  ) = \sec\alpha   or  \sec(90 - \alpha ) = cosec\:\alpha

<u>SOME GENERAL TRIGNOMETRIC FORMULAS :-</u>

  • <u></u>\sin \alpha = \frac{1}{cosec \: \alpha }  or  cosec \: \alpha  = \frac{1}{\sin \alpha }
  • <u></u>\cos \alpha = \frac{1}{\sec \alpha }  or  \sec \alpha = \frac{1}{\cos \alpha }

<u>______________________________________________________</u>

Now , lets come to the question.

In a right angled triangle , let one angle be α (in place of theta) .

So , lets solve L.H.S.

\cos (90 - \alpha ) \times cosec(90 - \alpha )

=> sin\alpha  \times \sec\alpha

=> \sin\alpha  \times \frac{1}{\cos\alpha }

=> \frac{\sin\alpha }{\cos\alpha }

=> \tan\alpha = R.H.S.

∴ L.H.S. = R.H.S. (Proved)

3 0
3 years ago
Help me please with 3-111
LenKa [72]

Last Question

Because this may not be the question you want, I'll omit the first step which should be done with latex. The key to all of these except C is to invert the second fraction (turn the second fraction upside down) and multiply.

A

\dfrac{6}{5} * \dfrac{-2}{3}

=(6*-2) / (5*3) = - 12/15 = -4/5

B

\dfrac{7}{4} *\dfrac{5}{3}

= (7*5) / (4*3) = 35 / 12 = 2 11/12

C

Impossible to do 4/0 cannot be done.

D

\dfrac{-2}{3} /\dfrac{-5}{4}=\dfrac{-2}{3} *\dfrac{-4}{5}

= (-2*-4)/(3*5) =

8/15


4 0
4 years ago
If a box has a length of 12 inches, a width of 10 inches and a height of 6 inches, what is the surface area?
Scrat [10]

Answer:

The answer is 28.

Step-by-step explanation:

Add all of them.

(L/ length) 12.

(W/ width) 10

(H/ height) 6

12 + 10 + 6 = 28

I hope this helps

6 0
3 years ago
Read 2 more answers
Each month, Stacey places a portion of her earnings in a retirement account. Her savings are invested in two companies. For ever
frozen [14]
9/2 = x/24
2x = 216
x = 108

108/24
6 0
3 years ago
Read 2 more answers
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