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
jolli1 [7]
2 years ago
11

Given the system of equations:

Mathematics
2 answers:
uranmaximum [27]2 years ago
8 0

Answer:

x=4

y=2

Step-by-step explanation:

2x+2y=12

x−y=2

​In order to solve by elimination, coefficients of one of the variables must be the same in both equations so that the variable will cancel out when one equation is subtracted from the other.

2x+2y=12,x−y=2

To make 2x and x equal, multiply all terms on each side of the first equation by 1 and all terms on each side of the second by 2.

2x+2y=12,2x+2(−1)y=2×2

Simplify.

2x+2y=12,2x−2y=4

Subtract 2x−2y=4 from 2x+2y=12 by subtracting like terms on each side of the equal sign.

2x−2x+2y+2y=12−4

Add 2x to −2x. Terms 2x and −2x cancel out, leaving an equation with only one variable that can be solved.

2y+2y=12−4

Add 2y to 2y.

4y=12−4

Add 12 to −4.

4y=8

Divide both sides by 4.

y=2

Substitute 2 for y in x−y=2. Because the resulting equation contains only one variable, you can solve for x directly.

x−2=2

Add 2 to both sides of the equation.

x=4

The system is now solved.

x=4,y=2

Correct choice is B) x=4.

kozerog [31]2 years ago
4 0

answer is 4

because y=2 then you subsistute it in and then you find X

x-y=2 turns to x=y+2 then you subsistute that into x of the equation 2x+2y=12 which then is 2(y+2)+2y =12 and you should get y=2 then you grab the other equation x-2=2 and you should get x=4

You might be interested in
What is electronic government ? and give some examples of it ..
yanalaym [24]

The electronic government or e-government, also used as synonyms the terms electronic administration or e-administration, consists of the use of information and communication technologies and knowledge in internal government processes, as well as in the delivery of the products and services of the State to both citizens and industry.

Like e-government examples we can take: Portals, ERP, GRPs, CRMs and social networks.

8 0
3 years ago
Bat ampanget ko???????????
attashe74 [19]

Answer:

Tanungin mo si face para malaman mo

4 0
2 years ago
Sally wants to buy an assortment of candy. She has $7 dollars she can spend in the candy store. The candy store sells chocolate
Tom [10]

Answer:

I found the table by an online search (it is below)

Sally has $7 to spend in candy.

The price of a chocolate bar is $1.50

The price of a lollipop is $0.75

The price of gumballs is $0.25

In the table, we have the following combinations.

a) 3 chocolate bars, 3 lollipops and 4 gumballs, the price is:

3*$1.50 + 3*$0.75 + 4*$0.25 = $7.75 (she can not buy this)

b) 3 chocolate bars and 4 gumballs, the price is:

3*$1.50 + 4*$0.25 = $5.50 (she can buy this)

c) 1 chocolate bar, 5 lollipops and 2 gumballs, the price is:

1*$1.50 + 5*$0.75 + 2*$0.25 =  $5.75 (she can buy this)

d) 2 chocolate bars, 2 lollipops and 8 gumballs, the price is:

2*$1.50 + 2*$0.75 + 8*$0.25 = $6.50 (she can buy this)

8 0
3 years ago
3+5i/-2+3i perform operation
melisa1 [442]

Answer:

\dfrac{9}{13}-\dfrac{19}{13}i

Step-by-step explanation:

Remember i^2=-1

You are given the fraction \dfrac{3+5i}{-2+3i}

First, multiply the numerator and the denominator by -2-3i:

\dfrac{3+5i}{-2+3i}=\dfrac{(3+5i)(-2-3i)}{(-2+3i)(-2-3i)}=\dfrac{(3+5i)(-2-3i)}{(-2)^2-(3i)^2}=\dfrac{(3+5i)(-2-3i)}{4-9i^2}=\dfrac{(3+5i)(-2-3i)}{4+9}

This gives you 13 in denominator, now multiply two complex numbers in numerator:

(3+5i)(-2-3i)=-6-9i-10i-15i^2=-6-19i+15=9-19i

Thus, the initial fraction is

\dfrac{9-19i}{13}=\dfrac{9}{13}-\dfrac{19}{13}i

4 0
3 years ago
HEY! GOT A BUTT LOAD OF HW DUE TOMORROW PLS HELP BRAINLIEST ANSWER INCLUDED! Solve. How much pure acid is in 520 milliliters of
Rama09 [41]

540ml  with 12% solution

get 12% of 540

540 times 0.12 = 64.8 ml of pure acid

3 0
3 years ago
Other questions:
  • 0.14 repeating decimals
    12·1 answer
  • Greg has $250 to spend. He wants to buy a new gaming system that is usually $380 but he knows it is on sale. If there is an 8% s
    8·1 answer
  • Quadrilateral ABCD has diagonals AC and BD. Which information is not sufficient to prove ABCD is a parallelogram
    5·1 answer
  • Will mark brainliest and thank you!! Extra points!!
    8·1 answer
  • There is a list of seven numbers. The average of the first four numbers is 5, and the average of the last four numbers is 8. If
    8·1 answer
  • use the elimination method to solve the system of equations. choose the correct ordered pairs -x + y=-3 and 3x + 2y=9
    7·1 answer
  • How do you find the area of a circle? Isn't it π and something?
    12·1 answer
  • HELP MEEEEEE DONT COMMENT UNLESS YOU KNOWWWWWWWWWW
    12·1 answer
  • PLEASE I NEED HELP! I WILL GIVE BRAINLIEST IF YOUR ANSWER IS CLEAR!!!!! ALSO NO LINKS PLEASE!
    9·1 answer
  • Multiply 2/3 by 42,and then multiply that product by 10​<br><br> Need to see the steps.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!