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3 years ago

If there are 12 girls and 15 boys in a class, which ratios are true?

Mathematics

2 answers:

marishachu [46]3 years ago

7 0

The first three are true

N76 [4]3 years ago

7 0

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 .

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svetoff [14.1K]

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It 1/4th
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3 years ago

An octagon has seven sides which have a length of k feet. The eighth side has a length of 3.9 feet, as shown below. The perimete

diamong [38]

Answer:

K is 3.4 feet

Step-by-step explanation:

To find the perimeter of the octagon, we add up the lengths of all the sides

For this particular octagon;

7 * k + 3.9 = 27.7

7k + 3.9 = 27.7

7k = 27.7-3.9

7k = 23.8

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7 0

3 years ago

In rectangle ABCD, AC = 48 andBO = 5x + 4. What's the value of x? 8.8 4 8 9

Oksanka [162]

X would equal 8.8 because
5x+4=48
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X=8.8

8 0

3 years ago

If you have changed the tires on your car, the original diameter is 24.5 inches. to a new diameter of 26 inches, how fast are yo

Liula [17]

Answer: c) 56.2

Step-by-step explanation:

Compare the original rate to the the new rate:

$\dfrac{diameter}{mph}:\dfrac{24.5\ in}{53\ mph}=\dfrac{26\ in}{x}\\\\\\24.5x=53(26)\\\\\\x=\dfrac{53(26)}{24.5}\\\\\\x=\large\boxed{56.2\ mph}$

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3 years ago

Which pair of numbers is relatively prime

Anna007 [38]

Without any calculations it's evident it can't be neither B (both numbers are even, so they're divisible by 2) nor C (the numbers end in 0 and 5, so they're divisible by 5).

A.
$57=3\cdot19\\
96=2^5\cdot3$
Both numbers have a factor of 3, so they're not relatively prime.
That means it must be D. But, let's check it.

$143=11\cdot13\\
323=17\cdot19$

Indeed, those two numbers are relatively prime.

5 0

3 years ago

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