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Ede4ka [16]
3 years ago
5

There are 30 seventh grade students in the cafeteria. In a representative sample of 25 students, there are 14 girls. Estimate th

e number of girls in the cafeteria.
Mathematics
1 answer:
Basile [38]3 years ago
7 0

Answer:

17 i think

Step-by-step explanation:

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How can I solve systems of equations by substitution method
almond37 [142]
This kind of hard to explain without an example, so I'll do my best...
All you have to do is isolate a variable on one side of the equals sign without a coefficient.  Ex:  x=2y+3  The x is all alone and ready to go into the second equation. 
Substitute into the second equation. Ex: 2x+5=3  Substitute: 2(2y+3)+5=3
I hope this helps! 

5 0
3 years ago
What is m∠B? (view attached file)
Pepsi [2]

Answer:

m∠B = 141°

Step-by-step explanation:

sides of polygon (n) = 7

sum of angles of polygon = {(n - 2) * 180°}

= {(7 -2)*180°}

= 5* 180°

= 900°

Now,

m∠B = 900° - 148° - 142° - 130° - 129° - 120° - 90°

m∠B = 141°

4 0
2 years ago
Problem 3
In-s [12.5K]
Third option, Quadratic
5 0
3 years ago
Which table has a constant of proportionality between y and x of 1/5? (from khan academy)
katovenus [111]

Answer:

C

Step-by-step explanation:

Solve for each choice until you get the answer 1/5.

A.

2 - 4/5

10/5 - 4/5 = 6/5; this is not 1/5

B

8 - 8/5

40/5 - 8/5 = 32/5; this is not 1/5

C

3 - 16/5

15/5 - 16/5 = -1/5

5 - 26/5

25/5 - 26/5 = -1/5

7 - 36/5

35/5 - 36/5 = -1/5; although this is negative, it still has the same proportionality of 1/5

6 0
3 years ago
The distance from Charles’s house to his school is 3 miles. His father gave him a ride for 1,760 yards, and he walked the rest o
slamgirl [31]
The answer is 2 miles or 3520 yards. (they are the same answer.)

If this helps, can you give me the brainliest answer? I need it...

Thank you very much.
8 0
3 years ago
Read 2 more answers
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