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Bess [88]
2 years ago
15

Simplify the following expressions

Mathematics
1 answer:
qaws [65]2 years ago
6 0

Answer:

1. -15c - 4

2. 3x - 5

3. 14q

4. -195 + 39m

5. 55b + 130

Step-by-step explanation:

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8 pieces of rope are cut into 13 lengths, how many pieces of rope are there?
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If im reading this question correctly, each piece of rope gets cut into 13 lengths.

So 8 X 13 = 104
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3 years ago
60 POINTS AND BRAINLIEST!!!
weeeeeb [17]

Answer:

Step-by-step explanation:

Putting values of x in equation

Y = 4(-3) - 4

= - 12 - 4 = - 16

Y = 4(-2) - 4

= - 8 - 4 = - 12

Y = 4(-1) - 4

= - 4 - 4 = - 8

Y = 4(0) - 4

= 0 - 4 = - 4

Y = 4(1) - 4

= 4 - 4 = 0

Y = 4(2) - 4

= 8 - 4 = 4

Y = 4(3) - 4

= 12 - 4 = 8

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3 years ago
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C because its C your welcome
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3 years ago
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g You are planning an opinion study and are considering taking an SRS of either 200 or 600 people. Explain how the sampling dist
Katen [24]

Answer:

By the Central Limit Theorem, both would be approximately normal and have the same mean. The difference is in the standard deviation, since as the sample size increases, the standard deviation decreases. So the SRS of 600 would have a smaller standard deviation than the SRS of 200.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For the sampling distribution of size n of a sample proportion p, the mean is p and the standard deviation is s = \sqrt{\frac{p(1-p)}{n}}

Differences between SRS of 200 and of 600

By the Central Limit Theorem, both would be approximately normal and have the same mean. The difference is in the standard deviation, since as the sample size increases, the standard deviation decreases. So the SRS of 600 would have a smaller standard deviation than the SRS of 200.

6 0
3 years ago
X^2-x-20 how do I write that in factored form
Rufina [12.5K]

Answer:

(x+4)(x-5)

Step-by-step explanation:

You need to find two numbers that multiply to be -20 but add up to be -1.

4 0
3 years ago
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