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3 years ago

Please answer all of these

Mathematics

1 answer:

N76 [4]3 years ago

8 0

Answer:

11. a) 9
12. c) 0
13. c) -1/2
14. d) -3

Step-by-step explanation:

11.

-3(x - 11) = 6
x - 11 = -2
x = 11 - 2
x = 9

12.

-7x/9 + 2 = 2
-7x/9 = 0
x = 0

13.

-8x + 2 = 6
-8x = 4
x = 4/(-8)
x = -1/2

14.

4x - 5 = -17
4x = 5 - 17
4x = -12
x = -12/4
x = -3

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What is the average rate of change of g over the interval [-1 2]

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Answer:

its 3

Step-by-step explanation:

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3 years ago

Suppose the number of residents within five miles of each of your stores is asymmetrically distributed with a mean of 25 thousan

ohaa [14]

Answer:

$P(\bar X\:>27.8\:thousand)=3.07\%$

Step-by-step explanation:

Since the number of residents within five miles of each of your stores is asymmetrically distributed, the distribution of the sample means will be approximately normal with a mean of 25 thousand.

The standard deviation of the sample means is:

$\sigma_X=\frac{\sigma}{\sqrt{n} }$

$\implies \sigma_X=\frac{10.6}{\sqrt{50} }=1.4991$

The z value is $z=\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n}} }$

We plug in the values to get:

$z=\frac{27.8-25}{1.4991}=\frac{2.8}{1.4991}=1.87$

The area to the right of 1.87 is $1-0.96926=0.03074$ .

The probability that the average number of residents within five miles of each store in a sample of 50 stores will be more than 27.8 thousand is 3.07%

See attachment.

6 0

4 years ago

The length of a rectangle is 10 cm, which is 1/3 of it's perimeter. Evaluate its perimeter

Dmitriy789 [7]

Answer:

Perimeter = 30 cm

Step-by-step explanation:

10 cm x 3 = 30 cm

6 0

3 years ago

Read 2 more answers

Please Help pt 2 I don't understand any of this

dedylja [7]

Answer: $\bold{(D)\ \dfrac{3}{4}-\dfrac{1}{4}x}$

<u>Step-by-step explanation:</u>

$\ \ \dfrac{3}{4}-x\bigg(\dfrac{1}{2}-\dfrac{5}{8}\bigg)+\bigg(-\dfrac{3}{8}x\bigg)\\\\\\=\dfrac{3}{4}\bigg(\dfrac{2}{2}\bigg)-x\bigg[\dfrac{1}{2}\bigg(\dfrac{4}{4}\bigg)-\dfrac{5}{8}\bigg]+\bigg(-\dfrac{3}{8}x\bigg)\\\\\\=\dfrac{6}{8}-x\bigg(\dfrac{4}{8}-\dfrac{5}{8}\bigg)-\dfrac{3}{8}x\\\\\\=\dfrac{6}{8}-x\bigg(-\dfrac{1}{8}\bigg)-\dfrac{3}{8}x\\\\\\=\dfrac{6}{8}+\dfrac{1}{8}x-\dfrac{3}{8}x\\\\\\=\dfrac{6}{8}-\dfrac{2}{8}x\\\\\\=\dfrac{3}{4}-\dfrac{1}{4}x\quad \text{(reduced both fractions)}$

7 0

3 years ago

Answer correctly and i will give brainliest

Evgen [1.6K]

Answer:

$25 per month

Step-by-step explanation:

What we know:

3 months of a gym membership costs $75.

6 months cost $150.

To find the unit rate, divided 75 by 3, or 150 by 6.

150/6 = 75/3 = 25/1 = $25 per month

7 0

3 years ago