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Free_Kalibri [48]
4 years ago
8

In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Mean score on

test Number of ninth graders Glenwood 76 272 Central City 95 322 Lincoln High 73 161 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 81.3 . Of course, that is incorrect. What is the mean score for all ninth graders in the city
Mathematics
1 answer:
uysha [10]4 years ago
8 0

Answer:

81585

Step-by-step explanation:

the addition of the all the results divided by the total number of high schools.

76272+95322+73161 ÷ 3

244755÷3

81585

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(02.02 MC) Use the graph to fill in the blank with the correct number.
saveliy_v [14]

Answer:

The answer is "2"

Step-by-step explanation:

When we check the points where the x is -2

by calculating the "y-value":

It is 2, right?  

it implies that f(-2)=2

that's why the final answer is "2"

7 0
3 years ago
Which equation matches the graph?
lyudmila [28]
Cnsndjdjdkdkkdkdododododooopaospdppf
4 0
3 years ago
Read 2 more answers
What is the equation of the line that is perpendicular to the given line and has an x-intercept of 6?
zhenek [66]

First we have to find the slope of the givent line and for that we use rise / run method .

The points are (-4,4),(4,-2)

Here rise is

-2-4 =-6

And run is

4-(-4)=8

So slope is

= \frac{-6}{8} = \frac{-3}{4}

And the slopes of perpendicular lines are negative reciprocal of each other .

Therefore the slope of the required perpendicular line is

-(- \frac{4}{3}) = \frac{4}{3}

Now we use slope intercept form, and put x intercept , that is (6,0) and the slope that is 4/3 ,

y=mx+b
\\
0 = \frac{4}{3}*6 +b
\\
0=8+b
\\
b =-8

Therefore required equation is

y= \frac{4}{3}x -8

Correct option is the third option .

6 0
3 years ago
Read 2 more answers
1.2x = 6 what is the solution ​
Irina18 [472]

Answer:

x = 5

Step-by-step explanation:

<em>If you mean the solution to x, your answer is 5.</em>

Basically divide each term by 1.2 and simplify.


5 0
3 years ago
3/4 + 1/2 + 1/3 + 2/9 + ....... = 9/4 es verdadero oh falso y como se resuelve ?
Ahat [919]

The missing fraction is 7/9

<h3>Finding missing values in an addition equation</h3>

The given equation is:

\frac{3}{4}+\frac{1}{2}+\frac{2}{9}+x=\frac{9}{4}

This can be simplified as:

\frac{27+18+8+36x}{36} =\frac{9}{4} \\\\\frac{53+36x}{36} =\frac{9}{4}

Cross multiply

9(36)=4(53+36x)\\\\324=212+144x\\\\144x=324-212\\\\144x=112\\\\x=\frac{112}{144} \\\\x=\frac{7}{9}

Therefore, the missing value is \frac{7}{9}

Learn more on addition equations here: brainly.com/question/702197

#SPJ1

7 0
2 years ago
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