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3 years ago

Is the product of two prime numbers a prime number or a composite number?

Mathematics

2 answers:

frez [133]3 years ago

5 0

Answer:

a composite one

Step-by-step explanation:

Why?

It is easy-peasy.

First, it is impossible to have a prime number. Because primes are only divisible by 1 and themselves.

For example, 3 is a prime. 7 is a prime. Multiply them and get 21.

I hope it helped:)

abruzzese [7]3 years ago

4 0

Step-by-step explanation:

No, the product of two (or more) prime numbers cannot result in another prime number. By definition, a prime number is a number that is divisible by 1 or itself - the act of multiplying two or more primes together will always yield a number divisible by 1, itself and the prime numbers multiplied together to achieve it.

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Write a two step equation that has -5 as it solution.

Sonbull [250]

Answer:

$x^2 + 10x + 25 = 0$

Step-by-step explanation:

$x^2 + 10x + 25 = 0$

$(x + 5)^2 = 0$

$x = -5$

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3 years ago

What is the ratio of the intensities of an earthquake PP wave passing through the Earth and detected at two points 19 kmkm and 4

Tamiku [17]

Answer:

The ratio of the intensities is roughly 6:1.

Step-by-step explanation:

The intensity I() of an earthquake wave is given by:

$I = \frac{P}{4\pi d^{2}}$

<em>where P: is the power ans d: is the distance. </em>

Hence, the ratio of the intensities of an earthquake wave passing through the Earth and detected at two points 19 km and 46 km from the source is:

$\frac{I_{1}}{I_{2}} = \frac{P/4\pi d_{1}^{2}}{P/4\pi d_{2}^{2}}$

<em>where I₁ = P/4πd₁², d₁=19 km, I₁ = P/4πd₂² and d₂=46 km </em>

$\frac{I_{1}}{I_{2}} = \frac{d_{2}^{2}}{d_{1}^{2}}$

$\frac{I_{1}}{I_{2}} = \frac{46 km^{2}}{19 km^{2}}$

$\frac{I_{1}}{I_{2}} = 5.9:1$

Therefore, the ratio of the intensities is roughly 6:1.

I hope it helps you!

3 0

3 years ago

Devaughn's age is three times Sydney's age. The sum of their ages is 80. What is Sydney's age?

Gekata [30.6K]

U times any number by 3 and see witch ones the closest
27x3=81 that's what I think and that's the closest

6 0

3 years ago

Read 2 more answers

Samir bought 3 pounds of cement to repair the cracks in his sidewalk.Each crack needs to be filled with 2 ounces of cement. Will

drek231 [11]

Answer: He will divide to convert pounds to ounces.

Step-by-step explanation:

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3 years ago

Algebra 2 need help on a ( ABC )

Len [333]

Answer:

$x = \frac{15}{4}$

Step-by-step explanation:

b) set up equations so they are equal to each other,

$2x - 2 = - 3x + 12$

$5x = 14$

$x = \frac{14}{5}$

this is when f(x)=g(x) so our approximation was close.

c)solving it graphically is nearly impossible because the solution can be any value around the intersection. only way to be sure is to solve it symbolically.

3 0

3 years ago