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2 years ago

What is the value of this expression?

Mathematics

2 answers:

kherson [118]2 years ago

8 0

The answer for the this question should be the letter “D”

Minchanka [31]2 years ago

7 0

The answer would be D.

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Doing odd jobs in America <br>2000$ How much will it take to earn?<br>I want to know time

kari74 [83]

Answer:

Below:

Step-by-step explanation:

20 Hour Per Week.....

Hope it helps....

It’s Muska...≧◔◡◔≦

3 0

2 years ago

Multiply or divide. Show your work.<br><br> 3n²-n/n²-1÷n²/n+1

Ugo [173]

$\frac{3n^{2} - n}{n^{2} - 1} \div \frac{n^{2}}{n + 1}$
$\frac{n(3n) - n(1)}{n^{2} + n - n - 1} \div \frac{n^{2}}{n + 1}$
$\frac{n(3n - 1)}{n(n) + n(1) - 1(n) - 1(1)} \div \frac{n^{2}}{n + 1}$
$\frac{n(3n - 1)}{n(n + 1) - 1(n + 1)} \div \frac{n^{2}}{n + 1}$
$\frac{n(3n - 1)}{(n - 1)(n + 1)} \div \frac{n^{2}}{n + 1}$
$\frac{n(3n - 1)}{(n - 1)(n + 1)} * \frac{n + 1}{n^{2}}$
$\frac{3n - 1}{n - 1} * \frac{1}{n}$
$\frac{3n - 1}{n(n - 1)}$

5 0

3 years ago

A - 2 + 3 = -2 I need it worked out

Genrish500 [490]

Answer: a= -3

Step-by-step explanation:

a+3=-2

a=-3

4 0

3 years ago

Read 2 more answers

Sin(60-theta)sin(60+theta)

ehidna [41]

Step-by-step explanation:

$\sin(60 - \theta) \sin(60 + \theta) \\ = \{ \sin(60) \cos( \theta) - \sin( \theta) \cos(60) \} \{ \sin(60) \cos( \theta) + \cos(60) \sin( \theta) \} \\ = \{ \frac{ \sqrt{3} }{2} \cos( \theta) - \frac{1}{2} \sin( \theta) \} \{ \frac{ \sqrt{3} }{2} \cos( \theta) + \frac{1}{2} \sin( \theta) \} \\ \\$

from difference of two squares:

${ \boxed{(a - b)(a + b) = ( {a}^{2} - {b}^{2} ) }}$

therefore:

$= \{ {( \frac{ \sqrt{3} }{2}) }^{2} { \cos }^{2} \theta \} - \{ {( \frac{ \sqrt{3} }{2} )}^{2} { \sin }^{2} \theta \} \\ \\ = \frac{3}{4} { \cos }^{2} \theta - \frac{3}{4} { \sin}^{2} \theta$

factorise out ¾ :

$= \frac{3}{4} ( { \cos }^{2} \theta - { \sin}^{2} \theta) \\ \\ = { \boxed{ \frac{3}{4} \cos(2 \theta) }}$

3 0

3 years ago

Read 2 more answers

The graph shows the rate at which paint is used to paint a wall. wat are the values to each statement below based on the graph.

zhuklara [117]

Answer:

Step-by-step explanation:

When 1 gallon is has been used 400 square feet of the wall will be paint
The unit rate is 400 square feet per gallon

3 0

3 years ago