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2 years ago

Which value makes the equation 2x -4 = 16 true? *

2 answers:

7 0

X = 10
Move the four to the right of the equal sign, and change it’s negative sign to a positive sign. Then, add 16 and 4. You will get 20. Then divide 2x and 20 by 2. You will get x = 10

Alinara [238K]2 years ago

4 0

Answer:

10 makes this equation true

Step-by-step explanation:

2x -4 = 16 /+4

2x= 20 /÷2

x= 10

Test

2(10) - 4 = 16

20 - 4 = 16 Correct

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The ratio of 6:5 can be expressed as

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Answer:

the ratio of 6:5 can be expressed as 6/5

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2 years ago

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3 years ago

Can somone help me pls

Nastasia [14]

Answer:

x = 9

Step-by-step explanation:

First equation = 4x - 8

Second equation = 7x - 35

Seperate the equation with an equal sign to make it an equality equation and solve for X so :

4x - 8 = 7x - 35 (Given)

-3x - 8 = -35 (Subtraction property of equality)

-3x = -27 (Addition property of equality)

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4 0

2 years ago

Adult entrance fees to amusement parks in the United States are normally distributed with a population standard deviation of 2.5

kondor19780726 [428]

Answer: 1.509

Step-by-step explanation:

The formula of Margin of Error for (n<30):-

$E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 22

Level of confidence = 0.99

Significance level : $\alpha=1-0.99=0.01$

Using the t-distribution table ,

Critical value : $t_{n-1, \alpha/2}=t_{21,0.005}= 2.831$

Standard deviation: $\sigma=\text{ 2.5 dollars }$

Then, we have

$E=( 2.831)\dfrac{2.5}{\sqrt{22}}\approx1.509$

Hence, the margin of error for a 99% confidence interval for the population mean =1.509

4 0

2 years ago

Find value of each of the following 11+(-33)-(-7)

Dominik [7]

Answer:

= 11-33+7

= 11+7-33

= 18-33

= -15

Step-by-step explanation:

if we multiple + by - then it becomes -

if we multiple - by - then it becomes +

by this way I have done

I hope this will help u .

5 0

3 years ago