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
6

There are 18 girls in a class and the ratio of the number of girls and boys in the class is 3:2. Find the number of boys.

Mathematics
2 answers:
Paraphin [41]3 years ago
5 0

Answer:

12

Step-by-step explanation:

Multiply to get the number of girls they've given you.

3 x 6 = 18 girls.

2 x 6 = 12 boys.

musickatia [10]3 years ago
5 0

Answer:

Number of boys = 12

Step-by-step explanation:

Let the total number of children in the class be x

Number of girls = 18

Number of boys = x - 18

Ratio of girls and boys = 3 : 2

Sum of the ratio = 5

<em><u>Find the value of x</u></em>

<em><u /></em>\frac{3}{5 } \times x = 18\\\\3 \times x = 18 \times 5\\\\x = \frac{90}{3} = 30<em><u /></em>

Therefore, total number of children in the class = 30

Hence number of boys  = x - 18 = 30 - 18 = 12

You might be interested in
PLEASE HELP HELP WITH QUESTION 1 and 2⁉️
Deffense [45]

1.

  • Turn right out of the nurse's office.
  • Turn left towards the stairwell.
  • Go up the stairs, then turn left into the hallway.
  • Go down the hallway and turn right into another hallway
  • Go down that hallway and turn left into classroom

7 0
4 years ago
An elevator descends into mine shaft at the rate of 6m/min. If the descend starts from 10m above the ground level , how long wil
AnnyKZ [126]

Answer: Hi!

So first, I'm going to convert "350 below ground level" to -350, as this is what "below ground level" represents.

Now, we should find the total distance traveled. Take the absolute value of -350 (350) and add it to 10, the metres above ground level. This is 360.

We already know the rate of travel; 6m/min. All we have to do now is divide the total distance (360) by the rate of travel (6)!

360 ÷ 6 = 60

So, it took 60 minutes, or one hour, for the elevator to travel down the shaft!

Hope this helps!

6 0
3 years ago
OK I need help I ever tried several ways .
zhenek [66]

ok so u need to find the gcd and then subtract.

7 0
3 years ago
Jenn's phone has a fully charged battery. With normal usage, he phone will last 16 hours. How long will her battery last if it o
Citrus2011 [14]

The correct answer is 4.8 hours

Explanation:

This mathematical problem can be solved by using the rule of three, which involves finding an unknown value by using three related values. The process is shown below:

1. It is known a fully charged battery (100% battery) lasts 16 hours. This can be represented as 100 = 16. But it is not know how much a 30% battery last; this can be represented as 30 = x.

2. Write all the values

100 = 16

30 = x

3. Cross multiply to create an equation and solve the equation

100 x = 48

x = 480 / 100

x = 4.8

6 0
3 years ago
Given p (a) = 0.45, p (b) = 0.30, p (a ∩<br> b.= 0.05. find p (a|b).
Mice21 [21]
Use the conditional probability formula, P(a|b) = P(a and b)/P(b)
7 0
3 years ago
Other questions:
  • alan drew a picture with four sides and four angles. all four sides are equal none of the angles are right angles. What is the s
    13·2 answers
  • What is $58.00 + 6% tax
    9·1 answer
  • What is 30% of 60?<br><br> 180<br><br> 0.18<br><br> 1800<br><br> 18
    10·1 answer
  • The ratio of the radii of two circles is 9:16. Then what is the ratio of their circumferences?
    15·1 answer
  • If the lengths of two sides of a certain triangle are 5 and 10, what is the length of the third side of the triangle?
    12·2 answers
  • The volume of a rectangular prism is 72 cubic centimeters. The prism is 2 centimeters wide and 4 centimeters high. What is the l
    7·1 answer
  • The 13th term of this geometric sequence is 16,384 and the first term is 4. what is the common ratio
    8·1 answer
  • Find the missing endpoint T of segment ET with endpoint E(-6,4) and midpoint M(4,8).
    12·1 answer
  • What do you mean by DEFCON ?
    13·1 answer
  • PLEASE ANSWER!!<br>I NEED HELP!!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!