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Liono4ka [1.6K]
2 years ago
12

Number 9 please I need help hurry

Mathematics
1 answer:
liberstina [14]2 years ago
8 0

Answer:

x=8

Step-by-step explanation:

Make all the denominators the same

3(x-4/10)=6(3/5)-2(x-5/15)

(3x-12)/30=18/30-(2x-10)/30

Cancel out all the denominators because they're the same

3x-12=18-2x+10

3x-12=28-2x

Add 12 to both sides

3x=40-2x

Add 2x to both sides

5x=40

Divide both sides by 5

x=8

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Explain the steps needed to determine the value of the expression
olga2289 [7]

Answer:

0

Step-by-step explanation:

=-5/6-7/6+2

=-12/6+2

=-2+2=0

8 0
2 years ago
The matrix to solve
Maurinko [17]
This question is impossible to solve.

this is why:

if 4x-4=0
then x=1

so if 8x + 4 = 8

then x is false.

I get these question quite a lot in my GCSEs.

you have to prove why they are fake.

4 0
2 years ago
Read 2 more answers
PLEASE HELP QUICK, I need to know the answer.
Marysya12 [62]

The equivalent expression is 7^{2}.

We have the following expression -

\frac{7^{-3} }{7^{-5} }

We have to find its equivalent value.

<h3>What is the equivalent expression of the following expression-</h3>

f(x, y) =\frac{A^{x} }{A^{y} }

In order to divide two exponents with same base, we use the 'Quotient property of exponents.

The equivalent expression can be written as -

f(x, y) = A^{x} A^{-y} = A^{x-y}

In the question given we have -

\frac{7^{-3} }{7^{-5} }

Using the property discussed above -

7^{-3}\;7^{5} = 7^{-3+5} = 7^{2}

Hence, the equivalent expression is 7^{2}.

To solve more questions on exponents, visit the link below -

brainly.com/question/17173276

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3 0
1 year ago
Read 2 more answers
A sample was taken of the salaries of four employees from a large company. the following are their salaries, in thousands of dol
Free_Kalibri [48]

For given sample of salaries of four employees, the variance of their salaries is: 26 thousands of dollars

The formula for the variance is,

S^2=\frac{\sum (x_i - \bar{x})^2}{n-1}

where,

S^2 = sample variance

x_i = the value of the one observation

\bar{x} = the mean value of all observations

n = the number of observations

For given question,

n = 4

First we find the mean of their salaries.

(33 + 31 + 24 + 36 ) / 4 = 31

So, \bar{x}=31

Using the formula for variance ,

S^2=\frac{(33-31)^2}{4-1}+\frac{(31-31)^2}{4-1}+\frac{(24-31)^2}{4-1}+\frac{(36-31)^2}{4-1}\\\\ S^2=\frac{4}{3}  + \frac{0}{3} + \frac{49}{3} + \frac{25}{3} \\\\S^2= \frac{4+49+25}{3}\\\\S^2=\frac{78}{3}  \\\\S^2=26

Therefore, for given sample of salaries of four employees, the variance of their salaries is: 26 thousands of dollars

Learn more about the variance here:

brainly.com/question/13673183

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7 0
1 year ago
T-Riffic produces T-shirts for a $20 design fee plus an
TiliK225 [7]
0=0
5=60
10=100
15=140
17=156
33=284
I think
6 0
3 years ago
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