MATHEMATICS HIGH SCHOOL

If there are 12 girls and 15 boys in a class, which ratios are true?12 girls to 27 students
5 boys to 9 students
15 boys to 12 girls
3 girls to 5 boys

Answers

Answer 1
Answer:

Answer:

12 girls to 27 students

5 boys to 9 students

15 boys to 12 girls

Step-by-step explanation:

The first thing we have to know is that the total number of students is 27 .

- 12 girls to 27 students  is correct because there are 12 girls out of a total of 27 estudiantes

- 5 boys to 9 students is correct because it uses a common denominator that is 3  (boys: 15 / 3 = 5 and students: 27 /3 = 9)

- 15 boys to 12 girls is saying the same of the statement

The last one 3 girls to 5 boys does not have a common denominator for both factors so this last option is false .
Answer 2
Answer: The first three are true

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Fifteen is __% of 120.

Answers

To do this,  divide 15 by 120.  You get 0.125  Then turn the decimal into a percent.  You do this by moving the decimal point to places to the RIGHT.  You get 12.5% as your answer.
It is 12.5%.

15 divided by 120 is 0.125, and in order to make it a percentage, multiply by 100% or move the decimal two places to the right.

Another way is to think about it and break it down. 60 is 50% of 120, and 15 is 25% of 60.
Since 15 is 25% of 60, which in turn in 50% of 120, 15 is 12.5%. 

I'm 1,000% sure it's correct.

Can someone these questions

Answers

9.

( 5 / 8 ) * ( 2 / 3 ) = 10 / 24 = 5 / 12  A ;

10.

( 11 / 12 ) ÷ ( 5 / 7 ) = ( 11 / 12 ) * ( 7 / 5 ) = 77 / 60 = 1 17 / 60 D ;
 
11.

3 / 8  B;

12.

2 5 / 8 = 21 / 8 ; the reciprocical of 21 / 8 is 8 / 21 C ;

13.

$12.50 * 34.5 =$ 431.25  C ;

Which of the following numbers is closest to 5?OA. √23
OB. √26
OC. √28
OD. √/22

Answers

The answer fam is........ √26

(x^2-6x+5)÷(x-1) solve using synthetic division

Answers

I hope this helps you

Whatt is the perimeter of a square if each side is five feet

Answers

Answer:

Perimeter = 5 feet + 5 feet + 5 feet + 5 feet

Perimeter = 20 feet

So, the perimeter of a square with each side measuring five feet is 20 feet.

Step-by-step explanation:
Hey there! So sense a square is all equal sides, they measure up the same! So if each side is 5 feet and there are 4 sides, you add 5, 4 times because you add the perimeter.. so

5 feet + 5 feet + 5 feet + 5 feet

= 20 feet!

Your perimeter would be 20 feet!

Show your work !

Thanks

Answers

For 1st. 
you can solve it by general law or , 
since the coefficient of r^2 = 1 
so u should think of 2 number which if u multiple them gives you 27 and sum of them is 12 and those numbers are 9 , 3 
so the answer (x+9)*(x+3) 
2nd problem :
g^2 - 9 = (g-3)*(g+3) 
3rd problem:
2p^3 + 6p^2 + 3p +9 
1st divide it into two parts 
(2p^3 +6p^2)+    (3p+9)
from the 1st part 
take 2p^2 as a common factor and from part 2 take 3 as a common factor and the equation be like 
2p^2(p+3)  + 3(p+3)
then take (p+3) as a common factor
so (p+3)* ( 2p^2 +3 )                                                         
1: (r+3)(r+9). 2: (g+3)(g-2). 3: (2p^2+3)(p+3). FOIL multiply the first, inside, outside, and last terms. add the inside and outside terms together. :)
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