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
zhuklara [117]
2 years ago
12

Solve system of equation using elimination by addition. Will give brainliest!!

Mathematics
1 answer:
DedPeter [7]2 years ago
5 0

Answer:

x = 2, y = -3

Step-by-step explanation:

Add the 2 equations together, then solve for x.

(2x + 2y) + (3x - 2y) = (-2) + (12)\\ 2x + 3x + 2y - 2y = -2 + 12\\5x = 10\\x = 2

Now that we know the value of x, we can easily find y by substitution.

3x - 2y = 12\\3(2) - 2y = 12\\6 - 2y = 12\\-2y = 6\\y = -3

These are the answers

- Kan Academy Advance

You might be interested in
Rewrite an equation so does not have fractions 5/6x+2=3/6
Dovator [93]

9514 1404 393

Answer:

  5x +12 = 3

Step-by-step explanation:

Multiply both sides of the equation by the least common denominator. Here, that is 6.

  \dfrac{5}{6}x+2=\dfrac{3}{6}\qquad\text{given}\\\\6\left(\dfrac{5}{6}x+2\right)=6\times\dfrac{3}{6}\qquad\text{multiply by 6}\\\\5x+6\times2=3\qquad\text{eliminate parentheses}\\\\\boxed{5x+12=3}}

6 0
3 years ago
Read 2 more answers
A plane at 3,800 feet is descending at a rate of 120 feet per minute, and a plane at 520 feet is climbing at a rate of 40 feet p
Llana [10]

so the basic formula for this d = rt

where d is the distance , r is the speed and t is time

 

3800 – 120t = 520 + 40t ( this is the altitude of each plane are equal)

Solve for t

T = 20.5 min time it takes for the planes to be at the same altitude

 

3800 – 120(20.5) = 1340 ft

<span> </span>

5 0
3 years ago
SOMEONE PLEASE ANSWER THIS ASAP FOR BRAINLIEST!!!!!!
Gennadij [26K]
The answer would be D. D is the correct answer because the x which is 100 is equal to the amount of U.S dollars and H(x) is equal to the amounts of euros. So H(100)= 75 can signify that she can exchange 100 U.S dollars for 75 euros.

Hope this helps!
8 0
3 years ago
HELPPP MEE PLEASEEE I DONT WANNA FAIL SUMMER SCHOOL NO FILES OR LINKS WOULD BE DEEPLY APPRECIATED
scoray [572]

Answer:

1) 1/4

2) 1 1/2

3) 9/5

4) 4 pounds

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
(-3) + 8 – 7x7<br> I need help with this on
nika2105 [10]

Answer: -44

Step-by-step explanation: PEMDAS(Parenthesis; Exponent; Multiply; Divide; Add; Subtract)

First you multiply the seven with the other seven to get 49. The problem will look like this: (-3) + 8 - 49. Now just add the -3 and 8. You'd get 5.

Now the problem looks like this: 5 - 49. And you then get -44.

3 0
3 years ago
Other questions:
  • Which of the following types of symmetry does the graph of the equation r=6sin 5 theta have?
    11·2 answers
  • A certain species of tree grows an average of 4.2 cm per week. write an equation for the sequence that represents the weekly hei
    12·1 answer
  • Kx = v - w <br> Solve for x
    14·2 answers
  • Find S5 for the sequence 3, 13, 23, 33, 43, 53, 63, 73.
    15·1 answer
  • What algebraic expression represents GK, if GK =37, what are GH and JK. GJ=4x+2 and HK=6x-1
    5·1 answer
  • Find sin(B) in the triangle.
    10·2 answers
  • Hey, does anyone have any questions that they need answered? I'll answer any that you have if I know them, I promise not to stea
    13·2 answers
  • Factor the quadratic expression completely.<br> -7x^2-24x-9
    11·1 answer
  • Which number line can be used to find the distance between (4, -1) and (8, -1)?
    7·2 answers
  • Free 100 coins for the person who answered last question
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!