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3 years ago

Set a is integers and B is whole numbers which one is correct...please help

Mathematics

1 answer:

sveticcg [70]3 years ago

7 0

<h3>Answer: Choice J (lower right corner)</h3>

-20 and -7 are in circle A, but outside circle B

0, 9, 81 are in circle B

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Explanation:

The set of whole numbers is

{0, 1, 2, 3, 4, ...}

While the set of integers is

{ ..., -3, -2, -1, 0, 1, 2, 3, ... }

The difference is that integers involves negative numbers.

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The upper left corner is incorrect because the "0" should be in set B since 0 is also a whole number. The lower left corner is also ruled out because of this reason.

The upper right corner (choice H) is incorrect as well because 10 and 46 are whole numbers also, so they belong in set B which is a better description/place for them.

So basically the numbers 0,1,2,3,... go in circle B. The negatives of those values will go in circle A, but outside circle B. Only choice J describes this kind of situation.

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Millie and Molly’s ages add up to 19 years Millie is three years older than Molly how old are they

Sindrei [870]

Answer:

Millie is 11. Molly is 8.

Step-by-step explanation:

Step 1: Subtract 3 from 19. The reason why you do this is to make sure that you don't have an extra 3 lying in there for the next few steps.

19-3=16

Step 2: Divide 2 from 16. You do this because there are two sisters.

16÷2=8

8 will then become Molly's age

Step 3: Add 3 to 8. This will give you Millie's age because she is 3 years older than Molly.

3+8=11

In conclusion, Millie is 11 and Molly is 8.

6 0

2 years ago

Alice wants to prove to her parents that listening to music while she does her homework will help her get better grades. She dec

Airida [17]

Answer:

She did not separate her friends into different groups, and she didn't apply a treatment.

Step-by-step explanation:

Alice decides to ask 25 of her friends if they listen to music while they do their homework and what their grades are.

She finds that her friends who have high grades also listen to music while they do their homework.

She tells her parents that she has proven that listening to music while doing homework will cause her grades to improve.

First of all it cannot be proven like this way.

Secondly, she did not use a random sample, and did not separated her friends into groups and applied treatment.

So, the answer is She did not separate her friends into different groups, and she didn't apply a treatment.

7 0

3 years ago

What is the area of a triangle that has a base of 3 feet and a height of 6 feet?

Nitella [24]

The formula of area of triangle is given by

$A= \frac{1}{2} b*h$

Where b is the base and h is the height .

In the given question, base ,b = 3 feet

Height, h= 6 feet

Substituting the values of b and h in the formula, we will get

$A = \frac{1}{2}*3*6 = 9 ft^2$

Correct option is C .

3 0

3 years ago

The crew of apollo 17 consisted of 2 pilots and a geologist. Suppose that nasa had actually trained 9 pilots and 4 geologists as

Troyanec [42]

They could have assembled total 336 different possible crews.

<em><u>Explanation</u></em>

Total number of trained pilots is 9 and geologists is 4.

The crew should be consisted of 2 pilots and 1 geologist. That means, <u>2 pilots are chosen from total 9 and 1 geologist is chosen from total 4</u>.

Number of ways for choosing 2 pilots from 9 $= ^9C_{3} =84$ and

Number of ways for choosing 1 geologist from 4 $=^4C_{1}= 4$

So, the total possible number of different crews they could have assembled $=84*4= 336$

8 0

3 years ago

Evaluate the expression for the given value of x<br><br> 7x + 8 for x = 2

Anit [1.1K]

Answer:

Step-by-step explanation:

Since x = 2, we can tell that x is equal to 2.

So this is basically asking 7 times 2 plus 8

7(2) + 8 = ?

14 + 8 = 22

Hope this helps!

4 0

3 years ago

Read 2 more answers

Set a is integers and B is whole numbers which one is correct...please help​

Set a is integers and B is whole numbers which one is correct...please help