3 years ago

Is a biased sample valid

Mathematics

1 answer:

murzikaleks [220]3 years ago

5 0

No a biased sample is not valid

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Answer:

(x, y) = (-11, 4)

Step-by-step explanation:

You can subtract 3 times the second equation from the first to eliminate y.

(7x +9y) -3(x +3y) = (-41) -3(1)

4x = -44

x = -11

Substituting into the second equation gives ...

-11 +3y = 1

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Vinvika [58]

Jason hit 11 homeruns.

Step-by-step explanation:

Homeruns hit by Nathan = 19

Let,

Homeruns hit by Nathan = x

Homerun hit by Jason = y

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We know that Nathan hit 19 homeruns, therefore, putting x=19 in Eqn 1

$19=2y-3\\19+3=2y\\22=2y\\2y=22$

Dividing both sides by 2;

$\frac{2y}{2}=\frac{22}{2}\\y=11$

Jason hit 11 homeruns.

Keywords: linear equations, addition

Learn more about linear equations at:

#LearnwithBrainly

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