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3 years ago

WILL MARK BRAINLIST!!!!

Mathematics

2 answers:

Lesechka [4]3 years ago

8 0

Answer:

Step-by-step explanation:

I had this answer

Oksanka [162]3 years ago

3 0

Answer: a=5cm. B=13cm. C=15cm

Step-by-step explanation:

Your welcome

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Please help me with just this one question.<br> 7th grade math

GREYUIT [131]

Answer:

B. y= (2x/3)+4

Step-by-step explanation:

i picked a point and plugged the x and y into the equation to see if it would work

(example: $(8)=\frac{2(6)}{3} +4\\$ )

then i did the same thing with a different point on the graph to make sure it was correct :)

6 0

3 years ago

4 times what equals 3/4

AURORKA [14]

Answer:

Is there supposed to be a fraction on the 4??

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

A researcher collated data on Americans’ leisure time activities. She found the mean number of hours spent watching television e

ikadub [295]

The value of the z statistic for the considered data is given by: Option A: -3.87 approximately.

<h3>How to find the z score (z statistic) for the sample mean?</h3>

If we're given that:

Sample mean = $\overline{x}$
Sample size = n
Population mean = $\mu$
Sample standard deviation = s

Then, we get:

$z = \dfrac{\overline{x} - \mu}{s}$

If the sample standard deviation is not given, then we can estimate it(in some cases) by:

$s = \dfrac{\sigma}{\sqrt{n}}$

where $\sigma$ population standard deviation

For this case, we're specified that:

Sample mean = $\overline{x}$ = 2.3
Sample size = n = 15
Population mean = $\mu$ = 2.7
Population standard deviation = $\sigma$ = 0.4

Thus, the value of the z-statistic is evaluated as:

$z = \dfrac{\overline{x} - \mu}{\sigma/\sqrt{n}} = \dfrac{2.3- 2.7}{0.4/\sqrt{15}} \approx -3.87$

Thus, the value of the z statistic for the considered data is given by: Option A: -3.87 approximately.

Learn more about z statistic here:

brainly.com/question/27003351

6 0

2 years ago

Mr. franklin paid $33.20 for 8 gallons of gas. What is the price of 1 gallon ?

evablogger [386]

The price of 1 gallon is $4.15. You figure this out by dividing 33.20 by 8.
33.20/8 = 4.15

3 0

3 years ago

Read 2 more answers

A village was founded four hundred years ago by a group of 20 people. In this village, the population triples every one hundred

Paha777 [63]

Answer:

Step-by-step explanation:

Treat this like compound interest: Use A = P(1 + r)^t.

Here, P is the initial population and A is 3 times that, or 3P. Since P = 20 people, 3P = 60 people,

and this population is reached after 100 years.

We need to determine r, substitute its value into the formula A = P(1 + r)^t, and then determine the population of the village after 400 years.

60 = 20(1 + r)^100

Simplifying, 3 = (1 + r)^100.

Taking the natural log of both sides,

ln 3 = 100 ln (1 + r), or

ln 3

ln (1 + r) = ---------------

100

= 1.0986 / 100 = 0.01986

We must solve this for r. Raising e to the power ln (1 + r), on the left side of an equation, and raising e to the power 0. 01986 on the right side, we get:

1 + r = 3, so r must = 2.

Now find the pop of the village today. Use the same equation: A = P (1+r)^t.

A = 20(1 +2)^4 (hundreds),

A = 20(3)^4, or

A = 81

The population after 400 years is 81.

8 0

3 years ago