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3 years ago

A 30 inch tv has a screen that is 18 inches high. how wide is the screen

Mathematics

1 answer:

Bond [772]3 years ago

8 0

Well from my calculations I got 24 inches.

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The 6 participants in a 200-meter dash had the following finishing times (in seconds): 27, 28, 27, 25, 24, 31 Assuming that thes

ollegr [7]

Answer:

Standard deviation of the population is 2.4

Step-by-step explanation:

Finishing times of 6 participants in 200 meter dash has been given as 27, 28, 27, 25, 24, 31.

We have to calculate the standard deviation of the population formed by these timings.

Formula of standard deviation is

$\sigma=\sqrt{\frac{\sum(x-\mu)^{2}}{n} }$

where $\sigma$ = standard deviation

$\mu$ = mean of the data

n = number of scores in the sample

Mean of given data = $\frac{27+28+27+25+24+31}{6}=27$

$\sum(x-\mu)^{2}=(27-27)^{2}+(28-27)^{2}+(27-27)^{2}+(25-28)^{2}+(24-27)^{2}+(31-27)^{2}$

= $0+1+0+4+9+16$

= 30

Now $\frac{\sum(x-\mu)^{2}}{n}=\frac{30}{6}=5$

$\sigma=\sqrt{5}$ = 2.236 ≈ 2.24

Therefore, standard deviation of the given data is 2.24

5 0

3 years ago

Please help me with this problem

sineoko [7]

Answer:

$4$

Step-by-step explanation:

$\frac{ {3x}^{2} -2x + 7}{2x+5} \\ \frac{3( - 1) {}^{2} - 2( - 1) + 7}{2( - 1) + 5 } \\ \frac{3 + 2 + 7}{ - 2 + 5} \\ \frac{12}{3} = 4$

7 0

3 years ago

Candice spent hours doing her homework. Her brother, Ronald, spent that number of hours doing his homework. How many hours did R

9966 [12]

Answer

you cannot know

Step-by-step explanation:

If you don't know the number of hours Candice did and there are no numbers to work with you cant do anything

4 0

3 years ago

Read 2 more answers

5x−4y=−10 −4x+5y=8

Alex787 [66]

Answer:

-1y+1x-2

Step-by-step explanation:

if you are combining like terms this is how you do it at all of the same variables together to simplify the expression

4 0

3 years ago

How do you convert 1.71 kg to cg?

Vesnalui [34]

the answer is 171000 cg

4 0

3 years ago