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3 years ago

Is this right? If not plz let me know!!! HURRY PLZ!!!!

Mathematics

1 answer:

labwork [276]3 years ago

4 0

Answer:

Math isnt my strongest subjuect but i believe it it right.

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Use the distributive property to demonstrate that the product of 10 and -1/5 is a negative number. Make sure to include all step

rodikova [14]

-1(10 * (-1/5))

(-10)(1/5)

-2

4 0

3 years ago

Marcus painted 1/3 of his bedroom in 4/5 of an hour. At this rate, how long would it take him the paint the entire room? I need

expeople1 [14]

So it took him 4/5 of an hour to paint 1/3
that means there is still 2/3 to go
so that means that he will have two times that time to paint the rest of the room
<u>4/5</u> = <u> ? </u>
1/3 2/3

using cross multiplication

(4/5)(2/3) = (1/3) (?)
8/15 = 1/3 ?
divide both sides by 1/3
so that will be 8/5
that means it will take 8/5 of an hour to complete the rest
or 12/5 total to do entire room

Hope this helps ;)

7 0

3 years ago

Consider the net of a rectangular box where each unit on the coordinate plane represents 4 feet. If a can of spray paint covers

Vesnalui [34]

Answer:

Step-by-step explanation:

took the test

6 0

3 years ago

Read 2 more answers

-7 - 7 ( 8x - 7 ) = - 19 + 5x

Yakvenalex [24]

-7 - 7( 8x - 7 ) = -19 + 5x
⇔ -56x + 49 = -12 + 5x
⇔ -61x = -61
⇔ x = 1

6 0

3 years ago

The national weather service keeps records of rainfall in valleys. Records indicate that in a certain valley the annual rainfall

Setler79 [48]

Answer:

The mean is 95 and the standard deviation is 2

Step-by-step explanation:

Central Limit Theorem

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.

In this question:

Population:

Mean 95, Standard deviation 12

Samples of size 36:

By the Central Limit Theorem,

Mean 95

Standard deviation $s = \frac{12}{\sqrt{36}} = 2$

4 0

2 years ago