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
lana66690 [7]
2 years ago
8

Chris and Josh have a total of 1,800 stamps in their collections, Josh and Jessica have a total of 2,200 stamps, and Jessica and

Chris have a total of 2,000. How many stamps in all the three children have?
Mathematics
1 answer:
LiRa [457]2 years ago
6 0

Answer: 3000 stamps

Step-by-step explanation:

Given

Chris and Josh have 1800 stamps

Josh and Jessica have 2200 stamps

Jessica and Chris have 2000 stamps

Suppose Chris, Josh, and Jessica have x,y, \text{and}\ z stamps

\therefore x+y=1800\quad \ldots(i)\\\Rightarrow y+z=2200\quad \ldots(ii)\\\Rightarrow z+x=2000\quad \ldots(iii)\\\text{Add (i), (ii), and (iii)}\\\Rightarrow 2(x+y+z)=1800+2200+2000\\\Rightarrow x+y+z=3000

Thus, all three have 3000 stamps

You might be interested in
I need help finding the area of this shape can you please help
BabaBlast [244]

Answer: 139.27

Step-by-step explanation:

So let find the area of the black swuare the length is 10 and the widith is 10, using bxh the area is 100. Now let find the aea of the semi-circle. The area of a fill circle is pi radius squared so a semi circle area will be 1/2( pi radius squared). The radius is 5 so we can calculate 1/2 of 25 pi equal = 39.27. Now let add the areas: 100+39.27=139.27.

8 0
2 years ago
A rectangular room is 4 yards long and 5 yards wide . Lucas is covering the floor with tiles that are 1 square foot . How many t
12345 [234]

Answer:

I think like 21

Step-by-step explanation:

i think it correct but if it not it okay but alaest I try my best on it

4 0
3 years ago
Double a number is equal to the number decreased by five. Find the number. A) -10 B) -5 C) 5 D) 10
sweet-ann [11.9K]
The answers be because it says DECREASED by 5 so it would be -5
4 0
3 years ago
Read 2 more answers
Which graph represents the given equation? <br><br> Y = 3/2x^2 + 4x - 2
lana [24]

Answer:

The graph is B

8 0
3 years ago
You deposit $600 in a savings account. The account earns 10% simple interest per year. a. What is the interest earned after 10 y
Mrac [35]

Answer:

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Estimate to the new integer I don't understand help 23 and 25 I'm.not sure this is right
    14·2 answers
  • What equation is the inverse of y=7x^2-10?
    11·1 answer
  • Scientists study ways to increase the population of wild salmon. How many salmon eggs may be needed to produce 18 adult salmon?
    12·1 answer
  • Can someone help me with this?
    10·1 answer
  • The perimeter of the base of the prism is __ units.
    15·1 answer
  • What<br> is the vaule of the expression to if f = 7?
    11·1 answer
  • I don’t understand my homework
    6·2 answers
  • The slope of the line that passes through the points (6,9) and (11,2) is
    8·2 answers
  • 4.2 in a whole number
    13·1 answer
  • Llllllllllllllllllllllllllllllllllllllllllllll
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!