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
Troyanec [42]
3 years ago
10

the sum of three numbers is 2100. the first number x is equal to the sum of the other two (y and z) which are equal to each othe

r. what are the three numbers x,y and z
Mathematics
1 answer:
max2010maxim [7]3 years ago
7 0
We will have a system of equations, and we are going to solve it by using substitution.
Let's make the equations.
x+y+z=2100
z+y=x
Since y and z are equal, I think it is easier for us to have them as one variable for now. Let the value of z and y be a.
These are the equations now.
x+2a=2100
2a=x
Since the second equation is giving the value of x, let it replace the value of x also in the first equation.
2a+2a=2100
4a=2100
2100÷4= 525
so, x and y equal 525. Let's put this in our original equation.
x+525+525=2100
x+ 1,050= 2,100
x= 1,050
So, x=1,050, y= 525 =z.

You might be interested in
Please help please <br><br> WILL HAVE A NEW FRIEND IF ANSWERED CORRECTLY
GenaCL600 [577]

Answer: the answer is D) 5/3.

Step-by-step explanation:

i hope this helps have a brilliant idea

5 0
3 years ago
If y=-3x + 2, find x when y= -13 *
Arturiano [62]

Answer:

x = 5

Step-by-step explanation:

You know what "y" equals, so you just need to insert the value into the equation, then solve for "x".

-13 = -3x + 2

-13 - 2 = -3x

-15 = -3x

5 = x

x = 5

7 0
3 years ago
PLEASEEE HELP FAST
Viktor [21]

Answer:

1. 4 as that is when he is closest.

2. 3 is when he is waiting as the graph is horizontal showing no movement

3. 4 would change as that is showing his pace walking home if it increased the slope would become steep but if it decreased it would level out more.

Step-by-step explanation:

4 0
3 years ago
What is the mean of the measures of the three exterior angles of a triangle if two of the interior angles have measures of 63 an
Genrish500 [490]

Answer:

  1. Mean score=120

Step-by-step explanation:

  1. Areas of a triangle add upto 180degrees (63+78+x=180) 141+x= (x=180-141) x=39
  2. Areas on a straight line add upto 180degrees

180-78=102

180-63=117

180-39=141

  1. 102+117+141=360
  2. Mean=360/3 =120

4 0
3 years ago
Ephemeral services corporation (esco) knows that nine other companies besides esco are bidding for a $900,000 government contrac
EastWind [94]

Answer:

c. $100,000

Step-by-step explanation:

Calculation of the expected net profit of Ephemeral services corporation

Since we are been told that 9 other companies besides esco are as well bidding for the $900,000 government contract, it means we have to find the expected net profit by dividing 1 by 9×$900,000 .Thus ESCO can only expect to cover its sunk cost.

Hence ,

E(X) = (1/9) × $900,000

E(X)=0.111111111×$900,000

E(X)= $100,000

Therefore the expected net profit would be $100,000

4 0
3 years ago
Other questions:
  • what is the circumference and area of a circle with a radius of 4 meters? round your answer to the nearest tenth.
    5·1 answer
  • Different varieties of field daisies have numbers of petals that follow a Fibonacci sequence. Three varieties have 13, 21, and 3
    8·2 answers
  • What is 1/9 multiplied by 7 as a mixed number
    9·1 answer
  • How would you write twice the difference between a number and 5?
    11·2 answers
  • What is the probability of spinning a 2 or 3 on a spinner with 5 sections and getting heads when flipping a coin?
    5·1 answer
  • Solve this 2 step equation <br> -2p + 12 &gt; 8
    10·2 answers
  • How many terms are in 3x + 2y - 5?
    13·2 answers
  • I really need help with this one! please help me!
    6·1 answer
  • I WILL GIve BRAINLIST<br> WHATS UR FAV KPOP SONG
    12·2 answers
  • Quadrilateral GABE is a square.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!