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2 years ago

11

Jenna's statistics classes have the following enrollments: section A has 22 students, section B has 38 students, and section c h

as 40 students. what percentage of Jenna's students are in section B

1 answer:

Elina [12.6K]2 years ago

5 0

Answer:38%

Step-by-step explanation:

38/100=.38

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Solve each system using elimination PLEASE HELP!!!

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1.
$8x+5y=6 \ \ \ |\times 2 \\
3x-2y=10 \ \ \ |\times 5 \\ \\
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16x+15x=12+50 \\
31x=62 \ \ \ |\div 31 \\
x=2 \\ \\
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3 \times 2-2y=10 \\
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2.
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\underline{15x+18y=240 \ \ } \\
40y+18y=50+240 \\
58y=290 \ \ \ |\div 58 \\
y=5 \\ \\
5x+6y=80 \\
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3.
$4x+12y=-24 \\
3x-6y=-18 \ \ \ |\times 2 \\ \\
4x+12y=-24 \\
\underline{6x-12y=-36} \\
4x+6x=-24-36 \\
10x=-60 \ \ \ |\div 10 \\
x=-6 \\ \\
3x-6y=-18 \\
3 \times (-6)-6y=-18 \\
-18-6y=-18 \ \ \ |+18 \\
-6y=0 \ \ \ |\div (-6) \\
y=0 \\ \\
(x,y)=(-6,0)$

4.
$5x-6y=48 \ \ \ |\times 2 \\
2x+5y=-3 \ \ \ |\times (-5) \\ \\
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2x+5y=-3 \\
2x+5 \times (-3)=-3 \\
2x-15=-3 \ \ \ |+15 \\
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2 years ago