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3 years ago

Solve the system by elimination.4x+8y=20 -4x+2y=30

2 answers:

4 0

4x+8y=20
-4x+8y=30
——————-
-4 and 4 cancel each other
16y=50
y= 25/8

4x+8y=20
4x+8(25/8)=20
4x+25=20
-25 -25
4x=-5
x= -5/4

(25/8 , -5/4)

Usimov [2.4K]3 years ago

3 0

Correct
25/8, -5,4
Would be your answer

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Step-by-step explanation:

Given

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Answer:

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For the diagram part, by a small online search y found the image that you can see below.

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3 years ago

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Hence, correct interpretation is : There is a 90% chance that the true proportion of teenagers who drive their own car to school will lie in (0.5907, 0.9093).

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