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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:

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27 students are going on a field trip4 students can ride in each carHow many cars will they need for the field trip?

Leviafan [203]

They need 7 cars for the field trip.

Step-by-step explanation:

The given is,

27 students are going to field trip

4 students in each car

Step:1

Let, T = Total students are going field trip

X = Students in each car

Y = Number of cars need for field trip

Step:2

From given,

T = 27

X = 4

Step:3

Numbers of cars need for field trip,

Y = $\frac{Total students are going field trip}{Students in each car}$

Y = $\frac{T}{X}$

= $\frac{27}{4}$

Y = 6.75 ( For the car, we need to convert the answer into whole number)

Y = 7 cars

Result:

They need 7 cars for the field trip, If 27 students are going on a field trip 4 students in each car.

8 0

3 years ago

Evaluate the indefinite integral. (Use C for the constant of integration.) sin(10x) 1 cos2(10x) dx

Schach [20]

Answer:

The result of the integral is $-\frac{\cos^3{10x}}{30} + C$

Step-by-step explanation:

We are given the following integral:

$\int \sin{(10x)}\cos^{2}{(10x)} dx$

I am going to solve by substitution, using $u = \cos{10x}$ , so $du = -10\sin{10x}dx, dx = -\frac{du}{10\sin{10x}}$ . So, we have

$-\frac{1}{10} \int u^2 du$

Which has the following result:

$-\frac{u^3}{30} + C$

Going back to x, the result of the integral is

$-\frac{\cos^3{10x}}{30} + C$

5 0

3 years ago

Use the number line to add the fractions.<br><br> help plz look at picture

mr_godi [17]

Answer:

$\frac{1}{6}$

Step-by-step explanation:

$- \frac{1}{2} + \frac{2}{3} = - \frac{3}{6} + \frac{4}{6} \\\\ - \frac{3}{6} + \frac{4}{6} = \frac{1}{6}$

5 0

3 years ago

Solve these plz<br>10 points for these plz solve<br>

eimsori [14]

Answer:

LCM of 18 and 20= 2

LCM of 45 and 72=9

HCM of 24 and 36=12

Step-by-step explanation:

4 0

3 years ago

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DUE TODAY!!!!!!!!!!!!!!!

andreyandreev [35.5K]

Answer:

1) b would be easier because it’s 1/2bh and since the base of 10 is easily divisible by 2 you don’t have to deal with fractions.

D=sqrt (x2-x1)^2+(y2-y1)^2

D=10

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers