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
emmainna [20.7K]
3 years ago
15

Solve the system using elimination. 3x – y = 28 3x + y = 14

Mathematics
2 answers:
leonid [27]3 years ago
5 0

Answer:

Step-by-step explanation:

Let 3x-y=28-----------(1)

Let 3x+y =14-----------(2)

(2)-(1)

3x-3x + y-(-y) =14-28

2y=-14

y=-14/2= -7

By adding 1 and 2

3x+3x+(-y)+(y) = 28+14

6x = 42

X=42/7=6

Vikki [24]3 years ago
4 0

Answer:

x= 7, y= -7         or          (7, -7)

Step-by-step explanation:

3x-y=28

3x+y=14

because the y is opposite of each other in both equations you can cancel them out

3x=28

3x=14

next you add 3x to 3x, then 28 to 14 and get...

6x=42

next divide both sides by 6 and you get your answer for x...

x=7

now you must solve for y and you do this by substituting what you found for x in one equation it doesn't matter which because you'll get the same answer but you can check for both to make sure...

3(7)+y=14

21+y=14

y=-21+14

y=-7

You might be interested in
Your guinea pig is five inches more than half your snake's length. If your guinea pig is 47 inches how long is your snake?
vagabundo [1.1K]
G = 1/2s + 5
g = 47

47 = 1/2s + 5
47 - 5 = 1/2s
42 = 1/2s
42 * 2 = s
84 = s.....so the snake is 84 inches
8 0
3 years ago
Read 2 more answers
If you can get 4 bottles of fruit juice for 10 dollars how much would 1 bottle cost
olga_2 [115]
Each bottle would cost $2.50 :)
5 0
3 years ago
The diagonals of a ________________ are ALWAYS perpendicular. A) parallelogram B) quadrilateral C) rectangle D) rhombus
Snowcat [4.5K]
The diagonals of rhombus is always perpendicular
7 0
3 years ago
Read 2 more answers
Find the value of x
kari74 [83]

Answer:

6.93

Step-by-step explanation:

hope this helps

3 0
2 years ago
Evaluate the profit function at each vertex. P = 0.04x + 0.05y + 0.06(16 – x – y) (8, 1) P = (14, 1) P = (3, 6) P = (5, 10) P =
mixas84 [53]
The given function is:
P = 0.04x + 0.05y + 0.06(16-x-y)

To get the function at each vertex, all you have to do is substitute with the given x and y values in the above equation and get the corresponding value of P as follows:
1- For (8,1):
P = 0.04x + 0.05y + 0.06(16-x-y)
P = 0.04(8) + 0.05(1) + 0.06(16-8-1)
P = 0.79

2- For (14,1):
P = 0.04x + 0.05y + 0.06(16-x-y)
P = 0.04(14) + 0.05(1) + 0.06(16-14-1)
P = 0.67

3- For (3,6):
P = 0.04x + 0.05y + 0.06(16-x-y)
P = 0.04(3) + 0.05(6) + 0.06(16-3-6)
P = 0.84

4- For (5,10):
P = 0.04x + 0.05y + 0.06(16-x-y)
P = 0.04(5) + 0.05(10) + 0.06(16-5-10)
P = 0.76

Hope this helps :)
4 0
3 years ago
Read 2 more answers
Other questions:
  • GEOMETRY NEED HELP ASAP WILL ASSIGN BRAINLIEST!!!
    7·2 answers
  • The vertex form of the equation of a parabola is y = 2(x+4)2-7.
    7·1 answer
  • a grocery store has 48 cartons of eggs .if there are 12 eggs in each carton, how many ounces of peanut butter are there in 1 ser
    12·1 answer
  • After 10 weeks of work, bob has $1200. After 15 weeks of work Bob has $1800. After 20 weeks of work Bob has $2400. Write the fir
    11·1 answer
  • Last question<br> 5x - 5 = 9x + 3<br> thank you first question i see gets brainlyest
    15·1 answer
  • Cheryl writes 7 fewer posts than Kevin on a social media site.
    12·1 answer
  • Which of the following is an example for a physical property that can be exploited for sparation?
    6·1 answer
  • I want derivative for (x+1)^2×e^x<br>please help​
    13·1 answer
  • Which system of linear equations appears to have a solution of (3, 0)?
    6·2 answers
  • Which other figure is a part of line CD?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!