Please Help! 20 points!

Mathematics

1 answer:

vesna_86 [32]4 years ago

8 0

Answer:

2 and 5 for sure. I think 4 is correct, but your teacher may not.

Step-by-step explanation:

The given expression reduces down to -7m - 8 = m - 4

1 cannot give -15m on the right. One seldom sees that mistake on Brainly.

3 does not do that. - 3m is not - 7m

4 has it's sides reversed. I would count it is right, others may not. I'm trying to say the left side is on the right side and the right side is on the left. That to me is OK.

5 is Ok as well the left is written as -8 - 7m which is -7m - 8. and with -4 and m

6 has been reduced on the left incorrectly. the right is it's signs backwards

2 4(?) and 5

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Which of the statements using operations on rational or irrational numbers always results in a rational number?

-BARSIC- [3]

<h3>Hm a irrational number is a number like this:</h3>

$1.999999\inf$

So adding a rational number, like 2, it would be irrational still:

$2+1.999999\inf=3.999999\inf$

That being said, answer C is wrong

Now, what is 2/2? Or 4/1? Whole numbers are one of the 3 types of rational numbers.

$2\ /\ 2=1\\\\4\ / 1=\ 4$

Thus the answer appears to be D

Now lets use the process of elimination to double check the answer:

The wording of your question is what will help us out here:

Which of the statements using operations on rational or irrational numbers <u>always results </u>in a <u>rational number?</u>

Because of that, any of the choices that involve a irrational number can result with another irrational number like so:

$a)\ 1.999\inf+ 1.999\inf=3.888\inf\\\\b)\ 2.999\inf / 1.999\inf= 1.50025\inf$

And there you go, the only answer that hasn't been proven wrong is answer D.

<h3>Now, if you like this answer and would like to see more please make sure to Like, Comment, and Rate this answer! Also, be sure to send me a friend request, I'm always up for a Challenge!</h3><h2>Thanks!</h2>

8 0

3 years ago

In the freshman class, 62% of the students take math, 49% take science, and 38% take both science and math. what percentage take

antoniya [11.8K]

we are given

62% of the students take math

so,

$n(M)=62$