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
dexar [7]
3 years ago
7

5x+y=23 2x+y=11 in elimination method

Mathematics
1 answer:
BaLLatris [955]3 years ago
3 0
Multiply the 2nd equation by -1 then add equations together
-1<span>(2x+y=11<span>)
</span></span>-2x - y = -11
(Adding will eliminate the Y)
3x = 12
------------------------------------
Divide each side by 3
3x ÷ 2 = 12 ÷ 3
x = 4
==================================================================
To find Y substitute 4 for x in 5x+y=<span>23
</span><span><span>(5)(4)</span>+y</span>=<span>23
</span>y+20=<span>23
</span>-----------------------------
Add -20 on each side
<span>y+20+-20</span>=<span>23+-20
</span>y = 3

Your answers are x = 4 and y = 3

You might be interested in
A rectangular box has faces with areas of 12,15, and 20 square units. What is the volume of the box?
miv72 [106K]
First find the side lengths of the box by factoring each area:

12: 1, 2, 3, 4, 6, 12
15: 1, 3, 5, 15
20: 1, 2, 4, 5, 10, 20

Find 3 numbers that both have 2 sides have in common and can multiply to make the areas of the faces:

12: 3 * 4
15: 3 * 5
20: 4 * 5

Sides: 3, 4, and 5

Then multiply to get the volume:

3 * 4 * 5 = 60 units^2

6 0
3 years ago
Work out the value of: 3x + 2y when x equals -3 and y equals -4
Mazyrski [523]

replace the numbers given for x & y so

the equation becomes 3*(-3) + 2*(-4) =

3*-3 = -9

2*-4 = -8

-9 + -8 = -17

6 0
3 years ago
Nina asked 30 of her friends what they thought about a new movie.
Sunny_sXe [5.5K]
No, this is not a random group of students. Because Nina asked her friends if they liked the movie. For her to ask a random group of people, she would have to go and ask people that she did not know.
4 0
3 years ago
Read 2 more answers
What is the area of a rectangle with length 5 inch and width 2.7 inch
Paha777 [63]
The area of the rectangle would be 13.5 inches.
7 0
3 years ago
tina's family buys 4 cheeseburges and three order of fries for $7.25. Louise's family buys 6 cheeseburgers and 3 orders of fries
nexus9112 [7]
It is 1.25 for 1 hamburger and .75 for fries. Sorry if it’s wrong but hope I helped!!
4 0
3 years ago
Other questions:
  • a toy copany want to sell 1.600 toy airplanes this year. so far they have sold 600. what percant of thee sales goal have they re
    11·1 answer
  • In the figure, a∥e , m∥n , and m∠2 = 112°.
    15·2 answers
  • Please someone answer asap
    7·1 answer
  • A company sells t-shirts for $11 each and sweatshirts for $19 each. The number of t-shirts sold was 10 fewer than three times th
    14·1 answer
  • Which trinomials are prime?<br><br><br>Choose all answers that are correct.
    15·1 answer
  • What is the solution of the system of equation y = 2x − 3<br> 5x + y = 11
    5·1 answer
  • I need the volume and surface area
    10·1 answer
  • I need help. It's kinda hard for me. We have to use decimal numbers
    8·1 answer
  • What is the mean of the set of data? 18, 11, 16, 8, 16, 21 plz help
    6·1 answer
  • f(x)=(2x−1)(3x+5)(x+1) has zeros at x= -5/3, x= -1 and x= 1/2 What is the sign of f on the interval -5/3
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!