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2 years ago

Simplify the equation 28 - 6n + 7(2n -8)-3n

Mathematics

2 answers:

Flauer [41]2 years ago

6 0

Answer:

5n-28

Step-by-step explanation:

28-6n+7(2n-8)-3n

28-6n+14n-56-3n

28+8n-56-3n

28-56+8n-3n

-28+5n

5n-28

BaLLatris [955]2 years ago

4 0

Answer: 5n - 28

first, distribute 7 to (2n-8), which would be 14n - 56

rewrite to have all common terms next to each other, which would be:

-6n + 14n - 3n + 28 - 56

combine all like terms.

5n - 28

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So we know that, when Michelle bought the tickets, the account decreased by $33.04.
2t = 33.04
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3 years ago

K = mv / 2 solve for m . HELP PLEASE HURRY!

Aleksandr-060686 [28]

9514 1404 393

Answer:

m = 2k/v

Step-by-step explanation:

Identify the coefficient of m (v/2) and multiply by its inverse (2/v).

(2/v)k = (2/v)m(v/2) . . . . multiply both sides of the equation by 2/v

2k/v = m . . . simplify

m = 2k/v

3 0

2 years ago

According to the US Bureau of Labor Statistics publication News, self-employed persons with home-based businesses work a mean of

worty [1.4K]

Answer:

The answer is below

Step-by-step explanation:

Given that mean (μ) = 23 hours, standard deviation (σ) = 10 hours

a) The population is a group of self employed home based workers while the variable is the number of hours worked per week.

b) The mean of the distribution of sample means (also known as the Expected value of M) is equal to the population mean μ.

$\mu_x=\mu=23\ hours$

The standard deviation of the distribution of sample means is called the Standard Error of M, it is given by:

$\sigma_x=\sigma/\sqrt{n} =\frac{10}{\sqrt{100} }=1$

c) $\mu_x=\mu=23\ hours$

$\sigma_x=\sigma/\sqrt{n} =\frac{10}{\sqrt{1000} }=0.32$

d) The sample size has no effect on the mean, hence increasing the sample size does not change the mean.

The square root of sample size is inversely proportional to the standard deviation therefore increasing the sample size reduces the standard deviation.

5 0

2 years ago

Enter the coordinates of the point

agasfer [191]

Answer: $(\frac{\sqrt{3} }{2} ,-\frac{1}{2} )$

Step-by-step explanation:

this forms a 30 degree reference angle

and this is in the 4th quadrant

When the angle is 30 degrees, the coordinates are:

$(\frac{\sqrt{3} }{2} ,-\frac{1}{2} )$

6 0

1 year ago

4. Find x if PQ = RS,<br> PQ = 9x - 7, and RS = 29.

Gnoma [55]

Answer:

x=4

Step-by-step explanation:

Because we know that PQ = RS, we can use the transitive property to replace PQ in the first equation with 29:

9x-7=29

1) Add 7 to both sides:

9x=36

2) divide by 9 on both sides:

x=4

4 0

3 years ago