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3 years ago

One half of your CDs are scratched. One fifth will not play properly. You have 40 CDs. How many will not work play properly

2 answers:

8 0

So the 1/2 of the CDs that are scratched and the 1/5 that will not play properly would be counted towards the "How many will not work play properly."

So, you just want to find 1/2 of the CD count, and 1/5 of the CD count, and add them together.

1/2 of the CD count:

Just multiply 1/2 by 40. 1/2 * 40 = 40/2 = 20

So 1/2 of the CD count = 20.

Then 1/5:

1/5 * 40

40/5

8

So 8 = 1/5 of 40.

Since the total would be those two added together, you would add 8 and 20 together.

8 + 20 = 28

kvasek [131]3 years ago

6 0

1/2 of 40= 20

40/5=8

20+8=28

28 of your CDs will not work properly.

I hope this helps!

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How to write composite number till 25 in set builder form Pls help

dimaraw [331]

All the natural numbers which are not prime numbers are composite numbers as they can be divided by more than two numbers (1 and itself).

Example: factors of 12

12 ÷1 = 12

12÷ 2 = 6

12÷3= 4

12÷4 = 3

12÷6=2

12÷12 = 1

= {12,6,4,3,2,1}

Composite Number/ Its Factors

4 = {1,2,4}

6 = {1,2,3,6}

8 = {1,2,4,8}

9 = {1,3,9}

10 = {1,2,5,10}

12 = {1,2,3,4,6,12}

14 = {1,2,7,14}

15 = {1,3,5,15}

16 = {1,2,4,8,16}

18 = {1,2,3,6,9,18}

20 = {1,2,4,5,10,20}

21 = {1,3,7,21}

22 = {1,2,11,22}

24 = {1,2,3,4,6,8,12,24}

25 = {1,5, 25}

Hope it helps!

#MissionExam001

6 0

3 years ago

F(x)=2x² + 12, what is f(3)<br><br> 3<br> 12<br> 18<br> 30

Natali [406]

The answer to the question

8 0

2 years ago

Determine the factors of 3x2 + 10x − 8. (Which is the right answer?)

VMariaS [17]

ANSWER

$(3x - 2)(x + 4)$

EXPLANATION

The given quadratic trinomial is

$3 {x}^{2} + 10x - 8$

Comparing to the general quadratic trinomial:

$a{x}^{2} + bx + c$

We have a=1, b=10 and c=-8

$ac = 3 \times - 8 = - 24$

The factors of -24 that adds up to 10 are -2 and 12.

We split the middle term to obtain;

$3 {x}^{2} + 12x - 2x- 8$

Factor;

$3x(x+ 4) - 2(x + 4)$

Factor further;

$(3x - 2)(x + 4)$

The last option is correct.

4 0

3 years ago

Please help me plssssssssssssssssssssss

oksian1 [2.3K]

Problem 7

(45 pages)/(90 min) = 1/2 page per min, i.e. 1 page per 2 minutes

(60 pages)(120 min) = 1/2 page per min

Both lead to the same result, so yes they are proportional.

Their reading speed is identical.

<h3>Answer: True</h3>

7 0

2 years ago

Read 2 more answers

1.) Find all the factors of 54.

jonny [76]

QUESTION 1.

The factors of 54 are all natural numbers that can divide 54 exactly.

The factors of 54 are: {1,2,3,6,9,18,27,54}

QUESTION 2

The prime factors of 54 are factors of 54 that are prime numbers.

The prime factors of 54 are {2,3}.

Product of prime factors of 54 is $2\times 3^3$

QUESTION 3

All the factors of 60 are all positive integers that divide exactly into 60.

The factors of 60 are {1,2,3,4,5,6,10,12,15,20,30,60}

QUESTION 4

The prime factors of 60 are factors of 60 that are prime numbers.

The prime factors of 60 are {2,3,5}

The prime factorization of 60 is $2^2\times 3\times 5$ .

QUESTION 5

The factors of 30 are {1,2,3,5,6,10,15,30}

The different ways she can put the beads into the boxes are

$1\times 30$ ,

All 30 beads into one box or 1 bead in 30 boxes.

$2\times 15$ ,

2 beads each into 15 boxes or 15 beads each into 2 boxes

$3\times 10$ ,

3 beads each into 10 boxes or 10 beads each into 3 boxes

$5\times 6$ ,

6 beads each into 5 boxes or 5 beads each into 6 boxes

5 0

3 years ago