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2 years ago

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:

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

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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 $7^{2}$ .

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3 0

1 year ago

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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

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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
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6 0

3 years ago