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2 years ago

Simplify: 7(b-a)-7(b+a)

2 answers:

5 0

Answer:
-14a

Explanation:
We are given 7(b - a) - 7(b + a).

We can distribute the 7’s to get:
7b - 7a - 7b - 7a

Combining like terms, we have:
-14a

andrezito [222]2 years ago

3 0

Answer:

-14a

Step-by-step explanation:

Distribute:

7b-7a-7b-7a

Simply:

7b-7b cancels out which leaves you with -7a-7a which equals -14a

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Angle S and angle T form a linear pair if measurement of angle S equals 5X +9 and measurement of angle T equals 3X +11 find the

vampirchik [111]

Linear pair angles have too add to 180, so

5x+9+3x+11=180
8x+20=180
8x=160
x=20

so angle S is 5*20+9 = 109
angle T is 3*20+11 = 71

6 0

2 years ago

Please help me I’m in finals a don’t want to fail

Misha Larkins [42]

Answer:

1, 2, 3

Step-by-step explanation:

X <= 20 means that x has to be less than OR equal to 20.

The first option is -100. That's less than 20, so this statement is true.

The second option is 10. That's also less than 20, so this statement is also true.

The third option is 20. This is equal to 20, so this is also true.

The fourth option is 21, which is greater than 20, so it's not true.

The fifth option is 45, which is greater than 20, so it's not true.

Sorry I answered so late, hope this helps even though you probably don't need it anymore.

4 0

2 years ago

What number is 22% of 320

Lostsunrise [7]

70.4
The word "of" means to multiply, so 22% or .22 * 320 = 70.4

7 0

3 years ago

Read 2 more answers

What is the value of x?

liq [111]

An exterior angle is equal to the sum of the 2 non adjacent angles. In this case

100 = x + 70 Subtract 70
x = 100 - 70
x = 30

6 0

3 years ago

Read 2 more answers

true or false If x represents a random variable with mean 114 and standard deviation 40, then the standard deviation of the samp

Goshia [24]

Answer:

$\mu = 114, \sigma = 40$

We also know that we select a sample size of n =100 and on this case since the sample size is higher than 30 we can apply the central limit theorem and the distribution for the sample mean would be given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And the standard deviation for the sampling distribution would be:

$\sigma_{\bar X}= \frac{40}{\sqrt{100}}= 4$

So then the answer is TRUE

Step-by-step explanation:

Let X the random variable of interest and we know that the true mean and deviation for this case are given by:

$\mu = 114, \sigma = 40$

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And the standard deviation for the sampling distribution would be:

$\sigma_{\bar X}= \frac{40}{\sqrt{100}}= 4$

So then the answer is TRUE

6 0

2 years ago