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
Dahasolnce [82]
3 years ago
13

Q7.

Mathematics
1 answer:
VLD [36.1K]3 years ago
3 0

Answer:

10

Step-by-step explanation:

Let c = sum of ages of all children.

mean age of all children = c/15 = 7

c = 15 * 7 = 105

The sum of the ages of all children is 105.

Let b = sum of ages of the 9 boys.

mean age of boys = b/9 = 5

b = 9 * 5 = 45

The sum of the ages of the boys is 45.

The sum of the ages of the girls is c - b.

c - b = 105 - 45 = 60

The number of girls is 15 - 9 = 6

mean age of girls = (sum of ages of the girls)/(number of girls) =

= 60/6 = 10

You might be interested in
Can someone help me please
Nitella [24]

Answer:

16 units

Step-by-step explanation:

The perimeter is the sum of the lengths

Add up the lengths as shown

3+2+1+2+3+1+1+3

16 units

4 0
3 years ago
How can you tell if an ordered pair (x,y) is a solution or a system of linear equations?
zubka84 [21]

Answer:

you will know because it you do the system of whatever thingy and there are no two dots in the same row and the line is straight in either a negative or positive slope at a diagonal the equation is linear and its a function.

Step-by-step explanation:

The image is an example of a linear equation that is both a function and positive lenear

8 0
2 years ago
Read 2 more answers
Which word correctly describes the pentagon?
Lina20 [59]
Equilateral correctly describes pentagon
7 0
3 years ago
Read 2 more answers
A local flower shop sells a dozen roses for $15.48 if each rose cost the same price how much would It cost per rose
Blababa [14]
One rose would cost $1.29
8 0
2 years ago
There are 5 pink marbles and 4 orange marbles in a bag. Madison will randomly pick two marbles out of the bag without replacing
Vesnalui [34]
Your answer would be A
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which is a solution to ​2x squared -7 x= 3 ?
    15·1 answer
  • Geometry Help Please
    6·1 answer
  • There are 314 people in Geometrytown. The town is circular. The diameter is 10 miles. What is the population in people per squar
    12·1 answer
  • Below are two parallel lines with a third line intersecting them. Help me on this Geometry transversal angle!!​
    11·1 answer
  • If a rectangle has a width of 5 meters and a perimeter of 50 meters calculate the area.
    5·2 answers
  • Is it possible for two numbers to have a difference of 8, and a sum of -6? If so, what are the two numbers?
    11·1 answer
  • Evaluate the function.
    9·2 answers
  • On a coordinate plane, a curved line with a minimum value of (negative 2.5, negative 12) and a maximum value of (0, negative 3)
    6·2 answers
  • Bryce grows a sunflower that contains 1,354 sunflower seeds. Six people share the harvested seeds. If they share the seeds equal
    9·1 answer
  • HELP MEEEE !!!<br> Plsssss
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!