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3 years ago

How is 89 a prime number

1 answer:

4 0

Hello,

10*10=100>89
n=89 is prime if it not divisible by all prime less then its square root

0<89<100 ==>0<√89<10
The primes to test are 2,3,5,7.
89 does not end with a even digit ==> 89 is not divisible by 2
8+9=17 if not divisible by 3 ==>89 is not divisible by 3
89 does not end with 0 or 5 ==>89 is not divisible by 5

3*8+1*9=33 is not divisible by 7 ==>89 is not divisible by 7

So: 89 is prime.

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Explanation:

I'm guessing this is the question you meant to ask:

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What is an equation of the line that passes through the points (-2, 1) and (-8, 4)?

goldenfox [79]

<h2>Answer: y = - ¹/₂ x OR y - 1 = - ¹/₂ (x + 2) </h2>

<h3>Step-by-step explanation: </h3>

For us to write the equation for this line, we need to (1) find the slope of the line, and (2) use one of the points to write an equation:

The question gives us two points, (-2, 1) and (-8, 4), from which we can find the slope and later the equation of the line.

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We can now use the point-slope form (y - y₁) = m(x - x₁)) to write the equation for this line:

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we could also transform this into the slope-intercept form ( y = mx + c)

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To test my answer, I have included a Desmos Graph that I graphed using the information provided in the question and my answer.

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2 years ago

Match its group with its percentage or mean Using

krok68 [10]

(1)

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(2)

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(3)

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Mean = (Sum of observations)/(Number of observations)

= (5 + 3 + 2 + 9 + 4 + 4)/(6)

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(4)

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% = (4/10) × 100

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(5)

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% = (6/10) × 100

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(6)

Percentage of sample that were juveniles over 8 inches long - $\boxed{\sf{\red{10}}}$

Percentage = (No. of juveniles over 8 inches)/(Total no. of fishes) × 100

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