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3 years ago

What is f(5) if f(x) equals -2x + 1 Needed by Sunday Pls include explanation

Mathematics

1 answer:

Nana76 [90]3 years ago

5 0

Answer:

The answer is -9

Step-by-step explanation:

So all you have to do is just plug in 5 for x because x=5.

f(5)= -2x+1

f(5)= -2(5)+1

-10+1

f(5)= -9

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Simplify. |–4.1| = Thanks!

Alisiya [41]

|-4.1|

= 4.1

I hope that's help !

5 0

3 years ago

Suppose a researcher is estimating the proportion of trees showing signs of disease in a local forest. They randomly sample 150

Serhud [2]

Answer:

$0.167 - 1.96 \sqrt{\frac{0.167(1-0.167)}{150}}=0.107$

$0.167 + 1.96 \sqrt{\frac{0.167(1-0.167)}{150}}=0.227$

And the 95% confidence interval would be given (0.107;0.227).

Step-by-step explanation:

Information given

$X= 25$ number of trees with signs of disease

$n= 150$ the sample selected

$\hat p=\frac{25}{150}= 0.167$ the proportion of trees with signs of disease

The confidence interval for the true proportion would be given by this formula

$\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

For the 95% confidence interval the significance is $\alpha=1-0.95=0.05$ and $\alpha/2=0.025$ , and the critical value would be

$z_{\alpha/2}=1.96$

And replacing we got:

$0.167 - 1.96 \sqrt{\frac{0.167(1-0.167)}{150}}=0.107$

$0.167 + 1.96 \sqrt{\frac{0.167(1-0.167)}{150}}=0.227$

And the 95% confidence interval would be given (0.107;0.227).

6 0

3 years ago

Zula has a conical bird feeder with a volume of 64.3 cubic centimeters and a height of 7 centimeters. Which equation can be used

Fudgin [204]

Answer:

16.075 is the answer.

Step-by-step explanation:

16.075 is the answer. I hope this helps. You divide

64.3/7

=16.075

4 0

3 years ago

Read 2 more answers

Can you help me <img src="https://tex.z-dn.net/?f=2" id="TexFormula1" title="2" alt="2" align="absmiddle" class="latex-fo

kati45 [8]

Answer:

Step-by-step explanation:

2=8

3 0

3 years ago

What do I use to find the answer?

Volgvan

Answer:

164 Yards

Step-by-step explanation:

With the information in this problem, we need to assume that triangle ADE and ABC are similar, otherwise we would not have enough information to solve it.

1. AE/DE=AC/BC (Since the triangles are similar, the corresponding parts will have the same ratio. In other words, you should be able to multiply the length of any side in one triangle by the same number and get a side length of the similar triangle.)

2. AE/DE=(AE+EC)/BC (Rewrite side length AC as the sum of its parts)

3. 230/120=(230+85)/BC (Insert the values given for each side length into the equation)

4. 230/120=315/BC (Add 230 and 85)

5. 230*BC=315*120 (Cross multiply)

6. BC=315*120/230 (Divide each side by 230 to isolate BC)

7. BC=164.347826... (Plug the equation into a calculator)

8. BC=164 (Since the problem asks to round to the nearest yard and the number in the tenths place is below 5, round your answer down to 164)

btw definitely ignore that guy posting links

please lmk if i made any errors, hope this helps!!!

7 0

3 years ago