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3 years ago

why is there no need to go further than the multiples of 7 when checking if a number less than 100 is prime

Mathematics

1 answer:

andrezito [222]3 years ago

5 0

Step-by-step explanation:

because 7 is the highest prime number that when squared is less than 100, 11 yhe next prime number when squared is 121. As such all non-prime numbers less than 100 will be a would have prime factors of either 2, 3, 5 & 7

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Which property of multiplication is used to rename 5/6 to 10/12?

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Fraction is used to rename 5/6

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3 years ago

Factor the expression completely -15t-6

serg [7]

Answer:

$\large\boxed{-15t-6=-3(5t+2)}$

Step-by-step explanation:

$-15t-6=(-3)(5t)+(-3)(2)=-3(5t+2)$

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3 years ago

Solve for x and state the measure of the angles with an x in them

Arada [10]

Answer:

x = 83

Step-by-step explanation:

The sum of the angles of a quadrilateral is 360

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3 years ago

Read 2 more answers

Can y'all please help.

sattari [20]

Answer:

See explanation

Step-by-step explanation:

Step 1. Substitute for d to solve for n:

From the first equation:

$d=70-n$

Then substitute it into the second equation:

$0.1(70-n)+0.05n=5.5\\ \\7-0.1n+0.05n=5.5\\ \\7+(-0.05n)=5.5\\ \\-0.05n=5.5-7=-1.5\\ \\n=\dfrac{-1.5}{-0.05}=30$

Step 2: Substitute for n to solve for d:

$d+n=70\\ \\d+30=70\\ \\d=70-30=40$

There are 40 dimes and 30 nikels in the piggy bank

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3 years ago

If C=(a,b,x,y) and D=(m,n,o,p) then c union d is

Ilya [14]

Step-by-step explanation:

here,

C={ a,b,x,y}

D ={ m,n,o,p}

now,

C union D ={a,b,x,y} union {m,n,o,p}

= {a,b,x,y,m,n,o,p}

therefore C union D ={ a,b,x,y,m,n,o,p}

hope u get it...

5 0

3 years ago

why is there no need to go further than the multiples of 7 when checking if a number less than 100 is prime​

why is there no need to go further than the multiples of 7 when checking if a number less than 100 is prime