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2 years ago

10

If the number of students on one side of the rope is 54,and the number of students on the other side is 36,how many students mus

t be moved?

1 answer:

Alexxx [7]2 years ago

7 0

9 students from the side with 54 students must be moved to make both sides of the rope equal.

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Evaluate <br>2-8÷-2-3-12÷-6×-2<br>

Effectus [21]

Answer:

7

Step-by-step explanation:

2-8÷-2-3-12÷-6×-2

2 - -4 - 3 - 2 x -2

2 + 4 + -3 - -4

6 + -3 + 4

3 + 4

7 :)

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2 years ago

Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds)

zalisa [80]

Answer: $(57.41,\ 62.19)$

Step-by-step explanation:

Given : Sample size : $n=40$

Sample mean : $\overline{x}=59.8\text{ seconds}$

Standard deviation : $\sigma =9.2\text{ seconds}$

Significance level : $\alpha=1-0.9=0.1$

Critical value : $z_{\alpha/2}=1.645$

Formula to find the confidence interval for population mean :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=59.8\pm(1.645)\dfrac{9.2}{\sqrt{40}}\\\\\approx59.8\pm2.39\\\\=(59.8-2.39,\ 59.8+2.39)\\\\=(57.41,\ 62.19)$

Hence, a 90% confidence interval estimate of the population mean of all students = $(57.41,\ 62.19)$

6 0

2 years ago

Can someone help solve this problem??

Shtirlitz [24]

Answer:

the answer is 22

Step-by-step explanation:

-|-7|+|-2+17

the 7 becomes positive

(7|+|-2)+17

5+17

=22

7 0

2 years ago

Read 2 more answers

Help me wit dis plz for for 20 points

Alisiya [41]

Answer:

I dont know but combine like terms and then solve it will make It alot easier

5 0

2 years ago

Given the following system of equations: −x + y = 2 2x + 4y = 32 What action was completed to create this new equivalent system

tiny-mole [99]

Answer:

you just need to devide by 2 the second equation

Step-by-step explanation:

-x + y = 2 (you leave it as it is)

2x + 4y =32 => 2x/2 +4y/2 = 32/2

=> x + 2y =16

we can devide or multiply in an equation by any number we want, as long as we do it to every term.

6 0

2 years ago

Read 2 more answers