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
fiasKO [112]
2 years ago
9

Solve the simultaneous equations2x + 5y + 11 = 03x - y-8= 0​

Mathematics
1 answer:
vlabodo [156]2 years ago
5 0

Answer:

x = 1\frac{12}{17}, y = -2\frac{15}{17}

Step-by-step explanation:

2x + 5y + 11 = 0 --- Equation 1

3x - y - 8 = 0

15x - 5y - 40 = 0 --- Equation 2

Equations 1+2: 2x + 5y + 11 + 15x - 5y - 40 = 0 + 0

17x - 29 = 0

17x = 29

x = 29 ÷ 17

x = 1\frac{12}{17}

Substitute x = 1\frac{12}{17} into Equation 1:

2x + 5y + 11 = 0

2(1\frac{12}{17}) + 5y + 11 = 0

3\frac{7}{17} + 5y = -11

5y = -11 - 3\frac{7}{17}

    = -14\frac{7}{17}

y = -14\frac{7}{17} ÷ 5

y = -2\frac{15}{17}

You might be interested in
29<br> 6. Calculate the hourly rate of a person who works 40<br> hours for a wage of $387.20.
Vikentia [17]

Answer:

$ 9.68

Step-by-step explanation:

a person who earns $387.20. in 40 earns will earn $9.68 in one hour

4 0
3 years ago
Read 2 more answers
You can read 20 pages in 45 minutes. how many pages can you read in 1 minute​
butalik [34]

Answer:

enough to process what a word is

Step-by-step explanation:

8 0
3 years ago
Special right triangles, solve for x, y and z
Alika [10]

Answer:

x=14

y=27

z=43

Step-by-step explanation:

hope it helps!

6 0
2 years ago
Can u help me do this
chubhunter [2.5K]
There will be 2 books left over if he fills each box.
7 · 4 = 28
30 - 28 = 2

Good Luck
5 0
3 years ago
Solve the system by elimination 1: x+5y-4z=-10, 2x-y+5z=-9, 2x-10y-5z=0 .. . 2. Solve the system by substitution: 2x-y+z=-4, z=5
Kryger [21]
1 )
1st and 2nd equation (multiply 1st by -2 ):
-2x - 10 y + 8 z = 20
2 x -  y    + 5 z = -9
---------------------------
       - 11 y + 13 z = 11  /  * ( -20 )
1st and 3rd:
- 2 x - 10 y + 8 z = 20
   2 x - 10 y - 5 z = 0
-----------------------------
         - 20 x + 3 z = 20  /  * 11
        ----------------------------------
         220 y - 260 z = -220
        - 220 y + 33 z = 220
        ------------------------------
                       z = 0,      y = -1,        x = - 5
2 )  
       2 x - y + 5 = -4
       - 2 x + 3 y - 5 = - 10
       Substitution: y = 2 x + 9
       - 2 x + 3(2 x + 9 ) = -5
        4 x = - 32,          x = -8,    y = -7,   z = 5
3 )
      x + y + z = 11
   1.5 x+3 y +1.5 z = 21
      x = 2 y
   ------------------------
      3 y + z = 11  / * (-2)
      6 y + 1.5 z = 21
    ------------------------
     - 6 y - 2 z = -22
       6 y + 1.5 z = 21
      ------------------------
                 -0.5 z = -1,           z = 2,   y = 3,   z = 6
Answer: the store used 6 pounds of peanuts, 3 pounds of almonds and 2 pounds of raisins. 
           
8 0
3 years ago
Other questions:
  • What is the mean of the data set below: 0 1 1 2 5 6
    10·1 answer
  • -0.5 - 3.5= can someone please help me!!
    9·1 answer
  • 11.3.35
    5·1 answer
  • What is the answer for this problem?
    6·1 answer
  • GIVING BRAINLIEST TO PERSON WHO HELPS
    11·1 answer
  • 5x - 22 = -7 X Equals What?
    5·2 answers
  • Given the arithmetic sequence an = 4 + 8(n − 1), what is the domain for n?
    15·1 answer
  • If f(x) is a linear function, f(−2)=4, and f(1)=−1, find an equation for f(x)
    8·1 answer
  • Whoever answers this gets brainlist!
    5·1 answer
  • How would you find the area of this figure?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!