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Sphinxa [80]
3 years ago
12

The solution to -3(2-5x)=3x+12 is

Mathematics
2 answers:
Nuetrik [128]3 years ago
8 0

Solution is 1.5

Step-by-step explanation:

  • Step 1: Solve the expression.

-3(2 - 5x) = 3x + 12

-6 + 15x = 3x + 12

12x = 18

x = 18/12 = 3/2 = 1.5

ser-zykov [4K]3 years ago
8 0

Answer:

x = 1.5

Step-by-step explanation:

<u>Step 1:  Distribute </u>

-3(2 - 5x) = 3x + 12

(-3 * 2) + (-3 * -5x) = 3x + 12

-6 + 15x = 3x + 12

<u>Step 2:  Subtract 3x from both sides </u>

-6 + 15x - 3x = 3x + 12 - 3x

-6 + 12x = 12

<u>Step 3:  Add 6 to both sides </u>

-6 + 12x + 6 = 12 + 6

12x = 18

<u>Step 4:  Divide both sides by 12 </u>

12x / 12 = 18 / 12

x = 1.5

Answer:  x = 1.5

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skad [1K]

Answer:

Hamish's earning = $20

Harry's earning = $26

Step-by-step explanation:

Given the following :

Let Harry's earning per hour = x

Let Hamish earning per hour = y

Harry earns a dollar more than more than 5/4 the amount hamish earns per hour;

Therefore,

x = 5/4y + 1

x - 5/4y = 1 - - - - (1)

the amount Harry earns per hour is $2 less than 7/5 the amount Hamish earns per hour

x = 7/5y - 2 - - - - (2)

Substituting (2) into (1)

7/5y - 2 - 5/4y = 1

7/5y - 5/4y = 1 + 2

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Taking the L. C. M

(28y - 25y) / 20 = 3

28y - 25y = 60

3y = 60

y = 20

Substitute y = 20 into (1)

x - 5/4(20) = 1

x - 100/4 = 1

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x = 26

y = Hamish's earning = $20

x = Harry's earning = $26

8 0
4 years ago
Do one of the​ following, as appropriate.​ (a) Find the critical value z Subscript alpha divided by 2​, ​(b) find the critical v
babymother [125]

Answer:

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And if we find the critical value in the normal standard distribution or excel and we got:

z_{\alpha/2}= \pm 2.576

And we can use the following excel code:

"=NORM.INV(0.005,0,1)"

Step-by-step explanation:

For this case we have the following info given:

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We want to construct a confidence interval at 99% of confidence, so then the significance level would be 1-0.99 =0.01 and the value of \alpha/2 =0.005. And for this case since we know the population deviation is not appropiate use the t distribution since we know the population deviation and the best quantile assuming that the population is normally distributed is given by the z distribution.

And if we find the critical value in the normal standard distribution or excel and we got:

z_{\alpha/2}= \pm 2.576

And we can use the following excel code:

"=NORM.INV(0.005,0,1)"

7 0
3 years ago
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marusya05 [52]

Answer:

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Step-by-step explanation:

To be divisible by 4 the last two digits have to be divisible by 4

so

is 63 divisibly by 4?

no

because is odd and four is even

so we can conclude that 563 is not divisible by 4

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Step-by-step explanation:

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10 and -12

Step-by-step explanation:

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it said it needed to be 20 characters long. so this is me making it that

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