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2 years ago

2/3 of a class are girls. A) what is the ratio girls to boys in the class? B) what is the ratio boys to girls in the class

Mathematics

1 answer:

tekilochka [14]2 years ago

5 0

a) 2:1

b) 1:2

2/3 are girls so 1/3 are boys

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When I visit my brother it is a 532 mile round trip. If I visit my brother once a month how many miles would I travel in a year

almond37 [142]

Answe12800 miles

Step-by-step explanation:a year is 12 months, and mile round trip means there and back. so 532x24 for the 24 trips that equals 12768. 12768 rounded to the nearest hundreds is 12800

5 0

2 years ago

The average performance rating of the employees at Company A is 6.5 on a scale from 1 to 10 (10 being highest). The standard dev

djyliett [7]

Answer:

The best choice would be hiring a random employee from company A

Step-by-step explanation:

Supposing that the performance rating of employees follow approximately a normal distribution on both companies, we are interested in finding what percentage of employees of each company have a performance rating greater than 5.5 (which is the mean of the scale), when we measure them in terms of z-scores.

In order to do that we standardize the scores of both companies with respect to the mean 5.5 of ratings

The z-value corresponding to company A is

$z=\frac{\bar x-\mu}{s}$

where

$\bar x$ = mean of company A

$\mu$ = 5.5 (average of rating between 1 and 10)

s = standard deviation of company A

$z=\frac{\bar x-\mu}{s}=\frac{6.5-5.5}{2.1}=0.7142$

We do the same for company C

$z=\frac{\bar x-\mu}{s}=\frac{7.4-5.5}{6.8}=0.2794$

This means that 27.49% of employees of company C have a performance rating > 5.5, whereas 71.42% of employees of company B have a performance rating > 5.5.

So, the best choice would be hiring a random employee from company A

4 0

3 years ago

1, 6, 36, 216 what comes next

scZoUnD [109]

Answer:

The answer is 1296

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Please, help me out please

seraphim [82]

Answer: -17/28

Step-by-step explanation:

This is very easy.

We read f(x) as "a function of x"

Think of it as a machine. It takes in x, and gives us f(x) after doing some things to it.

f(x) = (x) × 4/7 + 9/4 ,

f(-5) = (-5) × 4/7 + 9/4

Let's work this out now!

= (-5) × 4/7 + 9/4

= -20/7 + 9/4

Now make into 1 fraction with common denominator

= -80/28 + 63/28

= -17/28

3 0

3 years ago

What percent is 33 of 96?

Ivan

1. We assume, that the number 96 is 100% - because it's the output value of the task. 
2. We assume, that x is the value we are looking for. 
3. If 96 is 100%, so we can write it down as 96=100%. 
4. We know, that x is 33% of the output value, so we can write it down as x=33%. 
5. Now we have two simple equations:
1) 96=100%
2) x=33%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
96/x=100%/33%

6 0

3 years ago

Read 2 more answers