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Pepsi [2]
3 years ago
7

Find the correct product. (n+7)^2

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
6 0

=n2+14n+49 is the answer you are looking for i do believe.

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Express 356 miles in 8 hours as a unit rate
andreyandreev [35.5K]
356/8 = 44.5

44.5 miles per hour, miles/hour
3 0
3 years ago
Read 2 more answers
A survey of 90 men found that an average amount spent on St. Patrick's day of $55 with a standard deviation of $18. A similar su
dem82 [27]

Answer:

The value of the test statistic is 4.70.

Step-by-step explanation:

The hypothesis for this test can be defined as follows:

<em>H</em>₀: Men do not spend more than women on St. Patrick's day, i.e. μ₁ = μ₂.

<em>H</em>ₐ: Men spend more than women on St. Patrick's day, i.e. μ₁ > μ₂.

The population standard deviations are not known.

So a <em>t</em>-distribution will be used to perform the test.

The test statistic for the test of difference between mean is:

t=\frac{\bar x_{1}-\bar x_{2}}{\sqrt{\frac{s^{2}_{1}}{n_{1}}+\frac{s^{2}_{2}}{n_{2}}} }

Given:

\bar x_{1}=55\\s_{1}=18\\n_{1}=90\\\bar x_{1}=44\\s_{1}=16\\n_{1}=86

Compute the value of the test statistic as follows:

t=\frac{\bar x_{1}-\bar x_{2}}{\sqrt{\frac{s^{2}_{1}}{n_{1}}+\frac{s^{2}_{2}}{n_{2}}} }=\frac{55-44}{\sqrt{\frac{15^{2}}{90}+\frac{16^{2}}{86} }}=4.70

Thus, the value of the test statistic is 4.70.

7 0
3 years ago
(10 points)What is the sum of the first ten terms of the sequence 4,-12, 36, -144...
MrRissso [65]

Answer:

b

Step-by-step explanation:

7 0
3 years ago
WILL MARK BRAINLIEST PLEASE HELP ME
garri49 [273]

Answer:

<em>4 blue marbles</em>

<u>Skills needed: Number Theory, Fractions</u>

Step-by-step explanation:

1) The problem tells us that the jar contains marbles that are either red, green, or blue (No Other Color).

It also mentions that \frac{2}{5} (\frac{4}{10}) of the marbles are red

and that \frac{1}{10} of the marbles are blue

- The given statement is that 20 marbles are green, and we need to find out the number of blue marbles.

2) We need to first find out the total number of marbles, and then multiply that by \frac{1}{10} to get the # of blue marbles.

---> Given \frac{4}{10} are red and \frac{1}{10} are blue, 1-\frac{1}{10}-\frac{4}{10} of the marbles are green (since fractions add up to <u>1 whole</u><u>)</u>

<u />1 - \frac{1}{10} - \frac{4}{10} = \frac{9}{10} - \frac{4}{10}=\frac{5}{10}<u />

<u />\frac{5}{10} \text{ is also } \frac{1}{2}<u />

Half the marbles are green.

3) Let's make the total marbles the variable: m

\frac{1}{2} * m=20 ---> Since half of (of signifies multiplication) the total marbles are green.

Multiply both sides by 2 to isolate: m = 20*2, m=40

Total number of marbles is 40.

4) After that, we multiply this by \frac{1}{10} since one-tenth of the total is blue.

---> \frac{1}{10}*m = \frac{1}{10}*40=4

4 blue marbles is the answer.

3 0
2 years ago
The area of a rectangle is 53.3 in2. If the width is 6.5 in, what is the perimeter of the rectangle?
Nuetrik [128]
You can find the length from
  A = LW
  53.3 in² = L×(6.5 in)
  (53.3 in²)/(6.5 in) = L = 8.2 in

The perimeter is twice the sum of length and width.
  P = 2(L +W)
  P = 2(8.2 in +6.5 in) = 29.4 in

The perimeter of the rectangle is 29.4 inches.
7 0
3 years ago
Read 2 more answers
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