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
Digiron [165]
3 years ago
12

If there are 10 boys to 7girls, how many boys are there when there are 21 girls?​

Mathematics
2 answers:
DedPeter [7]3 years ago
4 0

Answer:

30 boys

Step-by-step explanation:

10 boys to 7 girls= 10:7

Blank boys :21 girls

7x3=21

10x3=30

Blank=30

30 boys : 21 girls

r-ruslan [8.4K]3 years ago
3 0
30 I hope this helps!!
You might be interested in
What is the value of (3/10)3
Elenna [48]

Answer:

\frac{9}{10}

Step-by-step explanation:

In this question, one is asked to multiply a fraction by a whole number, first model the question.

\frac{3}{10}(3)

In a situation like this, one multiplies the whole number by the numerator (number) over the fraction.

\frac{3*3}{10}

Simplify,

\frac{9}{10}

A common error that people make is that they will multiply both the numerator and denominator by the whole number, this is the same as multiplying the answer by (1), thus it is incorrect.

6 0
2 years ago
Quick!!.
elena-14-01-66 [18.8K]
2 x 1/4 is the same as 1/4 + 1/4
5 0
3 years ago
Read 2 more answers
Carl is using a pine board to make a frame for a picture . He wants the dimensions of the frame to be 2 feet by 18 inches. How l
Tems11 [23]
You could find the need of pine board by finding the perimeter of the frame. But first you need to equalize the units, because one of them is in feet and the other one is in inches.
18 inches = 18/12 feet
18 inches = 1.5 feet

perimeter = l + w + l + w
perimeter = 2 + 1.5 + 2 + 1.5
perimeter = 7

The perimeter is equal to 7 feet, therefore Carl needs 7 feet of pine board
4 0
3 years ago
A rock with mass of 5.0 kg is carried up a small hill 10 meters high. What is the potential energy of the rock at the hilltop?
Sonja [21]

490J

Step-by-step explanation:

Given parameters:

Mass of rock = 5kg

Height of hill = 10m

Unknown:

Potential energy at the hilltop = ?

Solution:

Potential energy is the energy at rest of a body. it is given as:

                P.E = mgh

m is the mass of the body

g is the acceleration due to gravity = 9.8m/s²

h is the height of the hilltop

     P.E = 5 x 10 x 9.8 = 490J

Learn more:

Potential energy brainly.com/question/10770261

#learnwithBrainly

5 0
3 years ago
Answer the following question with work. -6x+40=220
navik [9.2K]
If you do 220-40 then the second digit of the negative number will equal x.
6 0
3 years ago
Other questions:
  • What is 300 times 500
    14·2 answers
  • Identify the factors of x2 − 4x − 12.
    15·2 answers
  • One of Alberto's zebra danios is 4/3 the length of one of his fancy guppies. Which fish is longer? Explain how you know.
    14·1 answer
  • The base of a ladder is placed 5 feet away from a 13 foot tall wall. What is the minimum length ladder needed to reach the top o
    6·2 answers
  • The box plots below show student grades on the most recent exam compared to overall grades in the class:
    9·2 answers
  • Factor 15y2 + 10y − 40.
    9·1 answer
  • Factor the polynomial.<br><br> 216x^3-64
    9·1 answer
  • Find the product and simplify your answer. 7a5(-3a⁴ + 5а - 5 )​
    9·1 answer
  • Some children hold a bake sale for a local charity, and raise $90. 10% comes from selling biscuits. 50% of the remaining money c
    8·1 answer
  • The average starting salary for an editor at a textbook company is $39,800. The actual salaries can vary by less than $1,300. Wh
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!