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Zigmanuir [339]
2 years ago
12

Chong can paint a car in y hours how long will it take him to paint 25 such cars​

Mathematics
1 answer:
allsm [11]2 years ago
5 0

Answer:

<em>Y25, considering the fact that y is a unknown variable and y is the amount of time that it takes to paint one car so multiply that by 25 for the 25 other cars he is painting and you will get your answer</em>

<em>You can also write it like this</em>

<em>Y25</em>

<em>(Y)25</em>

<em>Yx25</em>

<em>Y*25</em>

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Solve y=3x-7 and 4x+3y=18 by substitution
Schach [20]

Answer:

x = 3

y = 2

Step-by-step explanation:

4x + 3(3x - 7) = 18 <em>Substitute</em><em> </em><em>y</em>

4x + 9x - 21 = 18 <em>Simply</em>

13x - 21 = 18 <em>Add</em><em> </em><em>like</em><em> </em><em>terms</em>

13x = 39 <em>Add</em><em> </em><em>2</em><em>1</em>

x = 3 <em>Divide</em><em> </em><em>by</em><em> </em><em>1</em><em>3</em>

y = 3(3) - 7 <em>Substitute</em><em> </em><em>x</em>

y = 9 - 7 <em>Simply</em>

y = 2 <em>Subtract</em>

Let's check:

4(3) + 3(2) = 18

12 + 6 = 18

18 = 18

It works!

5 0
3 years ago
Read 2 more answers
The number of violent crimes committed in a day possesses a distribution with a mean of 2.3 crimes per day and a standard deviat
marusya05 [52]

Answer:

B) approximately normal with mean 2.3 and standard deviation 2

Step-by-step explanation:

Given the following :

Mean crimes per day = 2.3

Standard deviation = 2

Number of samples = 100

Sampling distribution of the mean:

According to the central limit theorem:

Sample mean = population mean

2.3 = 2.3

The standard deviation of the sample (s) : ratio of the population standard deviation and square root of the sample size.

s = population standard deviation / √sample size

s = 2 / √100

s = 2 / 10

s = 0.2

The central limit theorem also posits that once ths sample size is large enough, the sampling of the sample mean will be approximately normal.

Hence, the distribution is approximately normal, with mean of 2.3 and standard deviation of 0.2

7 0
3 years ago
There are 8 and 2 over 3pounds of walnuts in a container, which will be divided equally into containers that hold 1 and 1 over 5
kow [346]

Answer:

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Step-by-step explanation:

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7 is the integer that goes in the blank

6 0
3 years ago
Simplify 6x-2x+10x+2x+7x
Artist 52 [7]
The way is see the problem causes the answer to be 27x<span />
6 0
3 years ago
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Evaluate the expression:<br> 3(a + b - 3) - 212a + b - 4) when a = 2 and b = 1
olga_2 [115]

Answer:

417

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3-212*2+1-4=?

3-423+1-4=?

420+1-4=?

421-4=?

417

3 0
3 years ago
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