All categories

2 years ago

If f(x) = 3x – 12, what is f(2)?

Mathematics

2 answers:

rjkz [21]2 years ago

7 0

Answer:

B. -6

Step-by-step explanation:

We are given

$f(x)=3x-12$

we have to find f(2)

To find f(2) , we can plug x=2 into f(x)

and we get

$f(2)=3\times 2-12$

now, we can simplify it

$f(2)=6-12$

$f(2)=-6$

So, the value of f(2) is -6

fredd [130]2 years ago

5 0

It would be B. -6.

f(x) = 3x-12
f(2) = 3(2)-12
f(2) = 6-12
f(2) = -6

You might be interested in

"A cable TV company wants to estimate the percentage of cable boxes in use during an evening hour. An approximation is 20 percen

Marizza181 [45]

Answer:

The company should take a sample of 148 boxes.

Step-by-step explanation:

Hello!

The cable TV company whats to know what sample size to take to estimate the proportion/percentage of cable boxes in use during an evening hour.

They estimated a "pilot" proportion of p'=0.20

And using a 90% confidence level the CI should have a margin of error of 2% (0.02).

The CI for the population proportion is made using an approximation of the standard normal distribution, and its structure is "point estimation" ± "margin of error"

[p' ± $Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$ ]

Where

p' is the sample proportion/point estimator of the population proportion

$Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$ is the margin of error (d) of the confidence interval.

$Z_{1-\alpha /2} = Z_{1-0.05} = Z_{0.95}= 1.648$

$d= Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$

$d *Z_{1-\alpha /2}= \sqrt{\frac{p'(1-p')}{n} }$

$(d*Z_{1-\alpha /2})^2= \frac{p'(1-p')}{n}$

$n*(d*Z_{1-\alpha /2})^2= p'(1-p')$

$n= \frac{p'(1-p')}{(d*Z_{1-\alpha /2})^2}$

$n= \frac{0.2(1-0.2)}{(0.02*1.648)^2}$

n= 147.28 ≅ 148 boxes.

I hope it helps!

3 0

3 years ago

What is negative 7 over 2 simplified

anyanavicka [17]

It's just like multiplying and dividing a negative, such as -1 *2=-2 and -2 / 1= -1

if there is one negative then it will be negative, so in this case it will be -7 / 2=

answer= -3 1/2

8 0

2 years ago

69 is what percent of 46?

saul85 [17]

46/69 * 100
0.66666*100
which is 66percent

8 0

2 years ago

Read 2 more answers

Solve the system of equations. y = 2x y = x 2 – 15

goldenfox [79]

Answer:

d is your answer

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

4x+5x=63 <br> Solving linear equations

Rudik [331]

Answer:

x = 7

Step-by-step explanation:

4x+5x=63

Combine like terms

9x = 63

Divide by 9

9x/9 =63/9

x = 7

3 0

2 years ago