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balandron [24]
2 years ago
15

Can someone help me?

Mathematics
2 answers:
AnnyKZ [126]2 years ago
7 0
<h3>Answer:  -3.33</h3>

==========================================================

Explanation:

Everywhere you see an x, replace it with -4. Then apply the order of operations PEMDAS to evaluate.

f(x) = \frac{-14-x^2}{9}\\\\f(-4) = \frac{-14-(-4)^2}{9}\\\\f(-4) = \frac{-14-16}{9}\\\\f(-4) = \frac{-30}{9}\\\\f(-4) \approx -3.33333333 \\\\f(-4) \approx -3.33 \\\\

Mars2501 [29]2 years ago
4 0

Answer:

-3.33

Step-by-step explanation:

The question is simply asking you to plug -4 in for x.This turns our equation into:

(-14 - (-4)^2)/9.

Remember, PEMDAS.

First, let's square -4.

-4 * -4 = 16 (<em>A negative times a negative is a positive.</em>)

Next, let's turn the top into a single number.

-14 - 16 = -30

So, now our equation has boiled down to:

-30/9.

Our solution before we round:

-3.333333

Finally, we round it. Keep in mind the hundredths place is <em>two</em> decimal places.

-3.33 (REMEMBER: if the 3rd decimal place is ≥ 5, we would round up, however it isn't so we round down.)

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**PLEASE ANSWER TO HELP ME UNDERSTAND**
Anuta_ua [19.1K]

Answer:

1)  -120, -240, -360

2) 24 oz

Step-by-step explanation:

1) 24 * 5 = 120 , 24 * 10 = 240, 24 * 15 =360

5 years will be -120, 10 years will be -240, 15 years will be -360

2) 8 * 3 = 24 oz

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5 0
3 years ago
The standard deviation of a sample taken from population A is 17.6 for a sample of 25.
lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation \sigma_A is

\sigma_A = 17.6

The sample size n_A is:

n_A = 25.

For the sample of population B, the standard deviation \sigma_B is

\sigma_B = 21.2

The sample size n_B is:

n_B = 30.

Then the standard deviation for the difference of means has the following form:

\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}

Finally

\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23

7 0
3 years ago
Joe is 1.6m tall. His shadow is 2m long when he stands 3m from the base of a floodlight.height1.6 m2m3mWhat is the height of the
alexdok [17]
We are given the height of Joe which is 1.6 meters, the length of his shadow is 2 meters when he stands 3 meters from the base of the floodlight. 

First, we have to illustrate the problem. Then we can observe two right triangles formed, one is using Joe and the length of the shadow, the other is the floodlight and the sum of the distance from the base plus the length of the shadow. To determine the height of the floodlight, use ratio and proportion:

1.6 / 2 = x / (2 +3)

where x is the height of the flood light

solve for x, x = 4. Therefore, the height of the floodlight is 4 meters.
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3 years ago
The math problem is in picture
ehidna [41]

Answer:

B

Step-by-step explanation:

<h2>Welcome for the answer!</h2><h2 />
3 0
2 years ago
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