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3 years ago

Given the function f(x) = 3x2 − 4, what is f(-2)? A. -40 B. -16 C. 8 D. 32

Mathematics

2 answers:

adoni [48]3 years ago

8 0

^^ correct! It would be 8! Your answer is C.

Temka [501]3 years ago

3 0

All this is asking you to do is plug in -2 for x

f(x)=3x²-4

f(-2)=3(-2²)-4

f(-2)=12-4

f(-2)=8

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On a map, 1 inch equals 7.4 miles. Two houses are 1.5 inches apart on the map.

Art [367]

Answer:

half of 7.4 is 3.7 so the houses are 3.7 miles apart.

8 0

2 years ago

- 3x + 9 - 4 = x + 3 + 2x

Gwar [14]

-3x + 9 - 4 = x + 3 + 2x
-3x + 9 - 4 = 3x + 3
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6 0

3 years ago

Read 2 more answers

The proportion of students at a college who have GPA higher than 3.5 is 19%. a. You take repeated random samples of size 25 from

melomori [17]

Answer:

$\mu_{\hat{p}}=0.19$

$\sigma_{\hat{p}}=0.0785$

Step-by-step explanation:

We know that the mean and the standard error of the sampling distribution of the sample proportions will be :-

$\mu_{\hat{p}}=p$

$\sigma_{\hat{p}}=\sqrt{\dfrac{p(1-p)}{n}}$

, where p=population proportion and n= sample size.

Given : The proportion of students at a college who have GPA higher than 3.5 is 19%.

i.e. p= 19%=0.19

The for sample size n= 25

The mean and the standard error of the sampling distribution of the sample proportions will be :-

$\mu_{\hat{p}}=0.19$

$\sigma_{\hat{p}}=\sqrt{\dfrac{0.19(1-0.19)}{25}}\\\\=\sqrt{0.006156}=0.0784601809837\approx0.0785$

Hence , the mean and the standard error of the sampling distribution of the sample proportions :

$\mu_{\hat{p}}=0.19$

$\sigma_{\hat{p}}=0.0785$

8 0

3 years ago

I’m thinking it’s 13? But need someone to clarify if I’m correct!?

Papessa [141]

Answer:

It's 13

Step-by-step explanation:

Well, just use the triangle inequality theorem and pay close attention to angles CAB and EAC... that's all I can say

Hope that helped

8 0

2 years ago

I need help with these questions, thanks!

kifflom [539]

Answer:

????

Step-by-step explanation:

number 1 could be 2 different answers

7 0

3 years ago