All categories

3 years ago

Ratio of boys to girls in a class of 27 is 1:2 how many boys will there be?

Mathematics

2 answers:

Sedaia [141]3 years ago

7 0

Answer:

Number of boys is 9

Step-by-step explanation:

Hint: number of girls added to number of boys must equal 27

27/3 = 9

boys: girls ratio is 1:2, so boys constitute 1/3 of the class

boys -> 1 x 9 = 9

girls -> 2 x 9 = 18

(to check, 9 + 18 = 27. If solution is still unclear, try drawing a pie of 3 equal components to represent a 1:2 ratio of slices)

labwork [276]3 years ago

6 0

Answer:

Ratio of boys is 13.5 i think

Step-by-step explanation:

You might be interested in

Dr.Lamb is mixing a solution for his next patient. He has a cylindrical test tube which is 4 inches across on the inside. The de

SSSSS [86.1K]

Answer: There are 34.35 liters left in the test tube.

Step-by-step explanation:

Since we have given that

Depth of the tube = 9 inches

Circumference of base=4 inches

As we know the formula of circumference ,

$Circumference=2\pi r\\\\4=2\times \frac{22}{7}\times r\\\\4\times{7}{22\times 2}=r\\\\\frac{7}{11}=r$

Now, we need to find the volume of tube is given by

$\text{ Volume of test tube }=\pi r^2h\\\\\text{ Volume of test tube }=\frac{22}{7}\times \frac{7}{11}\times \frac{7}{11}\times 9\\\\\text{ Volume of test tube }=\frac{126}{11}=11.45\ inches^3$

Since we have also given that,

Of 1 cubic inch of space holds 3 liters of water,

So,

$1\text{ cubic inch}=3\text{ liters}\\\\11.45\text{ cubic inches}=3\times 11.45=34.35\text{ liters}$

Hence, there are 34.35 liters left in the test tube.

6 0

3 years ago

observa con atencion los siguientes desarrollos planos y encierra con cual de ellos se puede armar cada cuerpo uno de ellos tien

Viefleur [7K]

Answer:

Can you give it in a english

Step-by-step explanation:

7 0

3 years ago

I bought three shirts that had equivalent retail values I use 15 gift certificate at the time of purchase and paid a total of 81

Vlada [557]

Answer:

Each shirt costed $27

each

Step-by-step explanation:

HOPE IT HELPS!!! please mark brainliest :)

4 0

3 years ago

svet-max [94.6K]

Answer:

B. 4200

Step-by-step explanation:

A suitable calculator can add the terms for you. (See attached)

The first term is 69, and the common difference is 75-69 = 6. The general term is ...

an = a1 +d(n -1)

an = 69 +6(n -1)

Then the 28th term is ...

a28 = 69 +6(27) = 231

The average term is (a28 +a1)/2 = (231 +69)/2 = 150.

The sum is the number of terms multiplied by the average term:

sum = 28×150= 4200

5 0

2 years ago

Nearest hundredth of 3419.46

Kamila [148]

That's already rounded to the nearest hundredth, so the answer is 3419.46.

The picture below will help you.

4 0

3 years ago

Read 2 more answers