All categories

3 years ago

-4(-6 - 2n) = 30 + 8n

Mathematics

1 answer:

kati45 [8]3 years ago

8 0

Answer:

n=6/4

Step-by-step explanation:

-4(-6-2n)=30+8n

24+12n=30+8n

-24 =-24

12n=6+8n

-8n = -8n

4n=6

n=6/4

You might be interested in

Plz solve this question

Mkey [24]

$\huge \boxed{\mathbb{QUESTION} \downarrow}$

Simplify ⇨ 1/x(x+a) + 1/x(x-a)

$\large \boxed{\mathbb{ANSWER \: WITH \: EXPLANATION} \downarrow}$

$\sf\frac { 1 } { x ( x + a ) } + \frac { 1 } { x ( x - a ) } \\$

To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $x\left(x+a\right)$ and $x\left(x-a\right)$ is $x\left(x+a\right)\left(x-a\right)$ . Multiply $\frac{1}{x\left(x+a\right)} times \frac{x-a}{x-a}$ . Multiply $\frac{1}{x\left(x-a\right)} times \frac{x+a}{x+a}$ .

$\sf\frac{x-a}{x\left(x+a\right)\left(x-a\right)}+\frac{x+a}{x\left(x+a\right)\left(x-a\right)} \\$

Because $\frac{x-a}{x\left(x+a\right)\left(x-a\right)}$ and $\frac{x+a}{x\left(x+a\right)\left(x-a\right)}$ have the same denominator, add them by adding their numerators.

$\sf\frac{x-a+x+a}{x\left(x+a\right)\left(x-a\right)} \\$

Combine like terms in x-a+x+a.

$\sf\frac{2x}{x\left(x+a\right)\left(x-a\right)} \\$

Cancel out x in both the numerator and denominator.

$\sf\frac{2}{\left(x+a\right)\left(x-a\right)} \\$

Expand $\left(x+a\right)\left(x-a\right)$ .

$\boxed{\boxed{ \bf\frac{2}{x^{2}-a^{2}}}} \\$

3 0

3 years ago

Múltiplying polynomial (x+4)^2

Arisa [49]

Step-by-step explanation:

that's the answer bbbbbbbb

6 0

2 years ago

Isabella buys a digital camera and pays $7.20 in sales tax. The tax rate is 6%. What is the original cost of the camera?

Oksi-84 [34.3K]

<span>The original cost of the camera is $120.

Explanation:
6%=6/100=0.06. This means to find 6% tax on a sale, we multiply the amount of the sale by 0.06; this gives us 0.06x, since we don't know the cost of the camera.

We know the amount of tax is $7.20, so we have the equation 0.06x=7.20.

Divide both sides by 0.06:
0.06x/0.06 = 7.20/0.06
x=120.</span>

4 0

3 years ago

Read 2 more answers

Dorothy Little purchased a mailing list of 2,000 names and addresses for her mail order business, but after scanning the list sh

amm1812

Answer: c. 0.0778

Step-by-step explanation:

Let X is the number of non-authentic names in her sample with parameter :

n= 5 and p=40% = 0.40

Binomial probability distribution, the probability of getting success in x trials :-

$P(X=x)=^nC_xp^x(1-p)^{n-x}$