All categories

2 years ago

If f(x) = 4x - 12, what is f(2)? O A. -4 O'B. 4 O c. -20 D. 8 Helpppp plzzz

Mathematics

1 answer:

photoshop1234 [79]2 years ago

8 0

Answer:

-4

Step-by-step explanation:

f(x) = 4x - 12

Let x=2

f(2) = 4*2 - 12

= 8-12

= -4

You might be interested in

Determine the domain of the function (fog) (x) where f(x) = 3x-1/x-4 and g(x)=x+1/x

Mrac [35]

Answer:

$(-\infty,0)\cup(0, \frac{1}{3})\cup (\frac{1}{3},\infty)$

Step-by-step explanation:

The given functions are $f(x)=\frac{3x-1}{x-4}$ and $g(x)=\frac{x+1}{x}$ .

We now composed the two functions to find:

$(f\circ g)(x)=f(g(x))$

$\implies (f\circ g)(x)=f(\frac{x+1}{x})$

$\implies (f\circ g)(x)=\frac{3(\frac{x+1}{x})+1}{\frac{x+1}{x}-4}$

$\implies (f\circ g)(x)=\frac{4x+3}{1-3x}$

This function is defined if the denominator is not zero.

$1-3x\ne0$

$x\ne\frac{1}{3}$

We write this in interval notation as:

$(-\infty,\frac{1}{3})\cup (\frac{1}{3},\infty)$

We need to be cautious here as x=0 is not in the domain of g(x).

Therefore the domain of $(f\circ g)(x)$ is

$(-\infty,0)\cup(0, \frac{1}{3})\cup (\frac{1}{3},\infty)$

4 0

2 years ago

Multiply 8-2x/5* 45x^3+90^2/10x^2-20x-80

lys-0071 [83]

Answer:

excuse me can you speak english

7 0

2 years ago

A regular workweek is 40 hours. Overtime pay is time and one-half): Manual is a word-processor operator. He makes $13.50 an hour

pychu [463]

Overtime is over 40 so subtract 40 from 54 and get
54-40=14
14 hours hovertime
so multipliy usuall pay by 40 (since worked 40 normal hours) then add to overtime pay by 14 hours so

(13.5 times 40)+(13.5 times 1.5 times 14)=
540+283.5=823.5
answer is $823.50

4 0

2 years ago

12.

Sveta_85 [38]

Answer:

The answer is d because 10-3 is 7

7 0

2 years ago

Read 2 more answers

For each of these word problems, determine if the answer can be found using the division problem 125 ÷ 12.

olasank [31]

Answer:

125/12

Step-by-step explanation:

1st problem-no

2nd problem-yes

3rd problem-yes

4th problem-no

3 0

3 years ago