1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Makovka662 [10]
3 years ago
12

In a certain classroom, the ratio of boys to girls is 2 to 1. If there are 39 students in the classroom, how many are boys?

Mathematics
1 answer:
weeeeeb [17]3 years ago
8 0

Answer:

26 boys

Step-by-step explanation:

boys : girls = 2 : 1

If girls = x, than boys = 2x.

Altogether girls and boys = (x+2x) = 3x

Altogether girls and boys = 39

3x = 39

x = 39/3 = 13 (girls)

2x = (2*13) = 26 (boys)

You might be interested in
A cylinder and a cone have congruent heights and radii.what is the ratio of the volume of the cone to the volume of the cylinder
NemiM [27]

Answer:

1: 3 ratio of the volume of the cone to the volume of the cylinder

Step-by-step explanation:

Volume of cone(V) is given by:

V = \frac{1}{3} \pi r^2h

where, r is the radius and h is the height of the cone.

Volume of cylinder(V') is given by:

V' = \pi r'^2h'

where,  r' is the radius and h' is the height of the cylinder.

As per the statement:

A cylinder and a cone have congruent heights and radii.

⇒r = r' and h = h'

then;

\frac{V}{V'} = \frac{ \frac{1}{3} \pi r^2h}{\pi r'^2h'} = \frac{ \frac{1}{3} \pi r'^2h'}{\pi r'^2h'}

⇒\frac{V}{V'} =\frac{1}{3} = 1 : 3

Therefore, the ratio of the volume of the cone to the volume of the cylinder is, 1 : 3

4 0
3 years ago
Read 2 more answers
Can someone help me with this please
qaws [65]

Answer:

1. Answer is C

4. Answer is G

Step-by-step explanation:

I'm not sure how to explain 1 since I used a calculator.

Number 4 is where you choose a point on the line and count 4 blocks up and 5 blocks left. If it hits another point on the line then that's the graph.

7 0
3 years ago
mrs lim had some money she spent 4/7 of it on necklace and 1/6 of her remainig money on a bracelet she then had $990 left how mu
zmey [24]

Answer:

she spent $1782

Step-by-step explanation:

first we have to find out her total money then minus 990

to get that 990 /5 then multipliedby 6 is 1188

1188 over 3 then times by 7 is 2772

2772 is the total amount of money she had. minus what she had left which is 990 she has spent 1782 dollars

4 0
2 years ago
Consider the formula P = \dfrac{ H\cdot d}{m}P=
Lilit [14]

Answer:

The productivity is measured in cubic meters per kilogram.

Step-by-step explanation:

For the formula for the productivity P of the camel

P = \dfrac{ H\cdot d}{m}

where  H is the area of the hump and is measured in square meters, d is the distance the camel can travel (measure in meters), and m is the mass of the camel (measured in kilograms kg ).

Then, the productivity of the camel is measure in

P=\dfrac{meters^2\:*meters}{kilograms}

P=\dfrac{m^3}{kg}

cubic meters per kilogram.

7 0
3 years ago
Read 2 more answers
PLS HELP ME
s2008m [1.1K]
The students on the right hand side had better overall results

There were less people on the left hand side of the room this affects the average even with the right hand side having two zeros, another thing which the left hand side didn’t have.

Hope I helped
3 0
2 years ago
Other questions:
  • Anona hires a decorator to redecorate her bedroom. The decorator offers her 2 different plans: the basic plan has
    5·1 answer
  • The number 1/5 is which type of number?
    11·2 answers
  • What is 15 mL to the nearest 0.1 mL?
    8·1 answer
  • The diameter of a circle is 16 kilometers.What is the circle's circumference?​
    6·2 answers
  • How old will I be in 2020 if my birthday is september 14, 1995?
    13·2 answers
  • A cylindrical can contains an unknown number of golf balls. The can has a height of 10 inches and a volume of 15.625 Pi inches c
    5·1 answer
  • Complete factor of 12m+60
    11·1 answer
  • WILL GIVE BRAINIEST <br> Consider the function what is the function <br> Zoom in to see better
    8·2 answers
  • He .......... be eating pizza.​
    9·2 answers
  • nathan ordered one cheeseburger and one bag of chips for $3.75. jack ordered two cheeseburgers and three bags of chips for $8.25
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!