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3 years ago

What is the answer? {y=2x−6 y=5x−21

Mathematics

2 answers:

atroni [7]3 years ago

5 0

The answer would be b because if you substitute 5 in for x y=2x-6 would equal 4 and y=5x-21 would equal 4. I hope this helps!

melisa1 [442]3 years ago

3 0

Answer:

x=5, y=4. (5, 4).

Step-by-step explanation:

y=2x-6

y=5x-21

--------------

2x-6=5x-21

2x-5x-6=-21

-3x-6=-21

-3x=-21+6

-3x=-15

3x=15

x=15/3

x=5

y=2(5)-6

y=10-6

y=4

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3 years ago

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castortr0y [4]

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Step-by-step explanation:

We are given that a recent study reported that 73% of Americans could only converse in one language.

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Let $\hat p$ = sample proportion of Americans who could only converse in one language.

The z score probability distribution for sample proportion is given by;

Z = $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

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Now, probability that 100 or fewer of these Americans could only converse in one language is given by = P( $\hat p$ $\leq$ 0.77)

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The above probability is calculated by looking at the value of x = 1.08 in the z table which has an area of 0.8599.

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