I need help doing this problem

Three classes have the same number of students. The teachers compared attendance on one Friday. Mr. Lopez had 92.5% of his stude

Sunny_sXe [5.5K]

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Suppose the number of students in one of the classes is :

$x$

So ;

$Mr.Lopez \: \: had \: \: \frac{92.5}{100}x \\$

_________________________________

$Mrs.Foster \: \: had \: \: \frac{19}{20} x \\$

So :

$Mrs.Foster \: \: had \: \: \frac{19 \times 5}{20 \times 5} x \\$

$Mrs.Foster \: \: had \: \: \frac{95}{100}x \\$

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$Ms.Kelly \: \: had \: \: 0.9x$

$Ms.Kelly \: \: had \: \: \frac{9}{10} x \\$

$Ms.Kelly \: \: had \: \: \frac{90}{100} x \\$

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Compare :

$\frac{95}{100} x > \frac{92.5}{100} x > \frac{90}{100} x \\$

Thus :

$Mrs.Foster’s \: \: class \: > \: Mr.Lopez’s \: \: class \: > \: Ms.Kelly’s \: \: class \\$

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8 0

3 years ago

Help me solve this proportional<br>equation <br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B9%20%2B%20x%7D%7B9%7D%20%20%3D%20

Blizzard [7]

Cross multiplication, 3(9+x) = 63
27+3x = 63
3x = 63-27 = 36
x=36/3=12

5 0

3 years ago

the u.s. census bureau needs to estimate the median income of males in the u.s., they collect incomes from 2500 males. state the

Shkiper50 [21]

Individual : a male in the United States

Variable : income

Population : All males in the United States

Sample : 2500 males of which the information is collected

Parameter : Median income of males in the U.S

Statistic : Median income of the 2500 males sampled

Any quality, amount, or number that can be gauged or tallied qualifies as a variable. A data item is another name for a variable.
A sample is a subset of units chosen to represent all the individuals in a population. Because just a portion of the population was counted, it is only a partial enumeration. To estimate the characteristics of the total population of interest, data from the sampled units is used.
A statistic is a numerical representation of a sample, whereas a parameter is a numerical representation of the entire population.

To learn more about statistics, visit :

brainly.com/question/8058700

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4 0

2 years ago

Find the slope between the two points: (2,3) and (4,5)

eduard

Y2-y1=5-3=2 the slope is 1
x2-x1=4-2=2

4 0

3 years ago

What is 6x-3y=9 I can't figure it out

Bingel [31]

Answer:

x= 3 y=3

Step-by-step explanation:

6(3) - 3(3) =9

18 - 9 = 9

8 0

3 years ago