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irinina [24]
2 years ago
10

on Thursday, 30 students went to after-school tutoring. On Friday, 6 students went. What is the percent decrease in the number o

f students who went to tutoring?
Mathematics
1 answer:
joja [24]2 years ago
4 0
Hey there! :)

The answer is 80%

6 ÷ 30 = 0.2 = 20%

100 - 20 = 80

Hope this helped :)
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Solve for x, y, and z
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Answer:

The solution is x=1,y=2,z=3

Step-by-step explanation:

The given system of equations is ;\

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3x+4y−5z=−4...(2)

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Make x the subject in equation (1)

x=\frac{8+3y-4z}{2}...(4)

Put equation (4) into equation (2) and (3)

3(\frac{8+3y-4z}{2})+4y-5z=-4

Multiply through by;

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Expand;

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Equation (4) in (3)

4(\frac{8+3y-4z}{2})-5y+6z=12

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Put equation (6) into equation (5)

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34z-22z=-32+68

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Put z=3 into equation (6)

y=2(3)-4=2

Put y=2 and z=3 into equation 4

x=\frac{8+3(2)-4(3)}{2}=1

The solution is x=1,y=2,z=3

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