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4 years ago

What is 4 2/7 ⋅ 2 1/5 ?

Mathematics

2 answers:

Solnce55 [7]4 years ago

4 0

Answer:

The answer is 9 3/7

Step-by-step explanation:

Vikki [24]4 years ago

3 0

Answer: 9 and 3/7

Step-by-step explanation: To multiply a mixed number by a mixed number, we first want to write each mixed number as an improper fraction.

We can write a mixed number as an improper fraction by multiplying the denominator by the whole number and adding the numerator.

We can change $4\frac{2}{7}$ to the improper fraction 30/7.

We can also change $2\frac{1}{5}$ to the improper fraction 11/5.

Now, we are simply multiplying fractions. To multiply fractions, we multiply across the numerators and multiply across the denominators. When we multiply these fractions, we will end up with the fraction 330/35. Since 330/35 is not in lowest terms, we need to divide both the numerator and denominator by the greatest common factor of 330 and 35 which is 5 and we will get the improper fraction 66/7.

Notice however that 66/7 can be changed into a mixed number by dividing the denominator which is 7 into the numerator which is 66.

66 divided by 7 equals 9 with a remainder of 3 so we can write 66/7 as the mixed number 9 and 3/7.

Therefore, 4 and 2/7 × 2 and 1/5 = 9 and 3/7

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3 years ago

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Mrrafil [7]

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3 years ago

What is the square root of 6 ?

Finger [1]

It's an irrational number ... it can never be written down on paper exactly.

The beginning of it is 2.449489... and it keeps going forever.

You might think that using only part of a number in a problem makes your
answer wrong. In a way that's true. But if you use 2.449489 for the square-
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that's close enough ... even if you're building bridges or spacecraft.

"But", you say, "How can I hand in an answer on my homework that's wrong ?"

Here's a secret that's so big that nobody ever talks about it. Once you know it,
it'll change your whole way of thinking. And you'll stop fishing for answers on
the internet:

The answers in homework don't matter ! The answer is the least important
part of any homework problem, and nobody needs it. If your teacher needed
an answer, then he/she could get it a lot faster by working out the problem.
If he/she didn't have time to work on it, then the teacher would go to somebody
who knows it cold ... they certainly wouldn't ask somebody who's just learning
it for the first time.

The purpose of the homework is NOT to generate answers. It's to lead you
down the path of learning how to do the problem. When somebody else gives
you the answer and you hand it in, 2 things happen:

#1: you cheat;
#2: you don't learn anything.

It's a bad deal all around.

7 0

3 years ago