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Yuki888 [10]
3 years ago
6

Pls help I don’t know the answer

Mathematics
1 answer:
miskamm [114]3 years ago
8 0

Answer: The two values are: x = ±√2

Step-by-step explanation:

x² - 2 = 0

x² = 2 (add 2 to both sides)

x = √2 (square root each side)

x = ±√2 (when two things are equal, their square roots are equal)

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If A= (7,9) and B= (3,12) what is the length of AB?
MissTica
The length can be found using the Pythagorean Theorem...

c^2=a^2+b^2 and in this case:

d^2=(dx^2)+(dy^2)

d^2=(3-7)^2+(12-9)^2

d^2=-4^2+3^2

d^2=16+9

d^2=25

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So the length of AB=5 units.
8 0
3 years ago
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Hey I need an answer to this problem can you help
Rudik [331]

Answer:

36°

Step-by-step explanation:

Unknown Angle = 180° - 88° - 56°

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3 years ago
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Answer:

1) Is more representative

Step-by-step explanation:

The problem with his selection is that maybe there are few students participating in certain sport and those students maybe do quite more excercise than the rest (or quite less). This will modify the results because the sample he selected is biased. This problem wont be solved by method 3 or 4, because he is still selecting students that may modify heavily the results with a high probability

This problem will also appear if he choose a sample by class. Maybe, in a class there are quite few students, and selecting from class will make those students appear quite more often than, lets say, a 7th grade student selected at random, therefore the selection is biased in this case as well.

If he has a list with all seventh grade students, each student is equallly likely to be selected and as a consequence, the the results wont be biased. Approach 1 is the best one.

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