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2 years ago

1.how many ways can 3 boys and 6 girls sit in a row of 4 chairs?

Mathematics

1 answer:

Hoochie [10]2 years ago

3 0

Step-by-step explanation:

first way by sitting 3 person in one chair

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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B%7C1%20%20-%20x%7C%20%20%7C1%20-%20x%7C%20%7D%20" id="TexFormula1" title="

ANEK [815]

Answer:

$\frac{2}{ |1 - x| \times |1 - x| } =$

$= \frac{2}{ |1 - x|^{2} }$

$\frac{2}{ |1 - x| \times |1 - x| } =$

$= |1 - x| \times |1 - x| = 0$

$= |1 - x |^{2} = 0$

$= |1 - x| = 0$

$= 1 - x = 0$

$= ( - x) = ( - 1)$

$x = 1$

Step-by-step explanation:

I Hope This Help

7 0

2 years ago

PLEASE HELP ASAP!: Solve for a and b 6a-b=-5 4a-3b = -8

klemol [59]

Answer:

a = -1/2

b = 2

Step-by-step explanation:

Step 1: Rewrite 1st equation

-b = -5 - 6a

b = 5 + 6a

Step 2: Substitution

4a - 3(5 + 6a) = -8

Step 3: Solve

4a - 15 - 18a = -8

-14a - 15 = -8

-14a = 7

a = -1/2

Step 4: Plug in a to find b

6(-1/2) - b = -5

-3 - b = -5

-b = -2

b = 2

7 0

2 years ago

Ernesto brought plastic tubes that are each 5.3 meters long. If Ernesto makes a line of 18 tubes by placing the end-to-end, how

VARVARA [1.3K]

5.3×18=95.4 meters. you multiply it because you are trying to find the full length.

3 0

2 years ago

A sample of 50 drills had a mean lifetime of 12.17 holes drilled when drilling a low-carbon steel. Assume the population standar

zmey [24]

Using the z-distribution, it is found that the 95% confidence interval for the mean lifetime of this type of drill, in holes drilled, is (10.4, 13.94).

We are given the standard deviation for the population, hence, the z-distribution is used. The parameters for the interval is:

Sample mean of $\overline{x} = 12.17$
Population standard deviation of $\sigma = 6.37$
Sample size of $n = 50$ .

The margin of error is:

$M = z\frac{\sigma}{\sqrt{n}}$

In which z is the critical value.

We have to find the critical value, which is z with a p-value of $\frac{1 + \alpha}{2}$ , in which $\alpha$ is the confidence level.

In this problem, $\alpha = 0.95$ , thus, z with a p-value of $\frac{1 + 0.95}{2} = 0.975$ , which means that it is z = 1.96.

Then:

$M = 1.96\frac{6.37}{\sqrt{50}} = 1.77$

The confidence interval is the sample mean plus/minutes the margin of error, hence:

$\overline{x} - M = 12.17 - 1.77 = 10.4$

$\overline{x} + M = 12.17 + 1.77 = 13.94$

The 95% confidence interval for the mean lifetime of this type of drill, in holes drilled, is (10.4, 13.94).

A similar problem is given at brainly.com/question/22596713

6 0

2 years ago

The graph shows f(x) and its transformation g(x)

KATRIN_1 [288]

The curve for f(x) and g(x) have the same shape but only differs in their position relative to the y and x-axis. With respect to the y-axis, it shifted 5 units upward. With respect to the x-axis, it shifted 9 units to the right. Since the right hand side is equal to y, we add +5 to the right. Similarly, since the left hand side is equal to x, we add +9 to the left. If we transpose this to the right,it becomes -9. So the equation for g(x) is: g(x)=(1/2)^x−9+5

3 0

3 years ago

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1.how many ways can 3 boys and 6 girls sit in a row of 4 chairs?​

1.how many ways can 3 boys and 6 girls sit in a row of 4 chairs?