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
Ivenika [448]
3 years ago
10

Solve the system of equations by elimination 3x+4y=31 2x-4y=-6

Mathematics
2 answers:
ANEK [815]3 years ago
5 0
3x + 4y = 31
2x - 4y = -6

*The +4 and -4 in the center of the equation cancel out because 4-4 = 0*

3x = 31
2x = -6
------------

*add like terms*

3x + 2x = 5x

31 - 6 = 25

So now you should have this written on your paper ... > 5x = 25

*Divide by 5 on each side*

5x = 25
_      _
5      5

x = 5
Kobotan [32]3 years ago
5 0

Answer:

x = 5 and y = 4

Step-by-step explanation:

In elimination method we solve a system of two variable equations by eliminating one variable by operating the equations.

Given system of equations,

3x + 4y = 31  ------(1)

2x - 4y = -6 --------(2),

Equation (1) + equation (2),

3x + 2x = 31 - 6

5x = 25

x = 5

From equation (1),

3(5) + 4y = 31

15 + 4y = 31

4y = 16

y = 4

Hence, the solution of the given equations is, x = 5, y = 4

You might be interested in
Give an example of a quadratic equation with 2 + 3i as one of its solutions
Anastasy [175]

Answer:

Step-by-step explanation:

roots are (2+3i) and (2-3i)

reqd. eq. is (x-2-3i)(x-2+3i)=0

or (x-2)²-(3i)²=0

or x²-4x+9-9i²=0

or x²-4x+9+9=0

or x²-4x+18=0

5 0
3 years ago
A dance school allows a maximum of 15 students per class of 112 students signing up for class how many classes does the school n
STALIN [3.7K]
The school needs to offer 8 classes
7 0
3 years ago
Read 2 more answers
What is the sum of 5.3 x 10^5 and 3.8 x 10^4in scientific notation?
Natali5045456 [20]

Answer:

=5.68×10^5

Step-by-step explanation:

7 0
3 years ago
Two large numbers of the Fibonacci sequence are f50=12,586,269,025 and f51=20,365,011,074. What is the approximate value of the
GenaCL600 [577]

jsut divide them
12,586,269,025 and 20,365,011,074
f51/f50=20,365,011,074/12,586,269,025= 0.6183398874989


7 0
3 years ago
Jade’s new suitcase weighs 3kg.
timama [110]

Answer:

88%

Step-by-step explanation:

Since the suitcase weighs 3kg,

weight left for packing

= 25 -3

= 22kg

Percentage left for packing

=  \frac{weight \: left \: for \: packing}{total \: weight \: }  \times 100\%

=  \frac{22}{25}  \times 100\%

= 88%

8 0
3 years ago
Other questions:
  • Luke and Leia are selling hot dogs and hamburgers at a minor league baseball game. At the end of the day they determine they hav
    9·1 answer
  • Denise received 300 votes in election for student council president she was 60% of the students who voted in the election how ma
    5·1 answer
  • Use the values log 48 congruant to 1.68 and log 3 congruant to 0.48 to find the approximate value of log3 48.
    14·1 answer
  • What is the radius and center of (y-7)^2=25-(x-3)^2
    14·1 answer
  • If the nth term of a number sequence is n² – 3, find the first 3 terms and the 10th term​
    9·1 answer
  • Find the radius of the circle with diameter DG if OG = 12 cm and OD = 5 cm
    6·1 answer
  • Gina is putting books on a shelf that is 21 2⁄3 inches long. If each book is 2 1⁄3 inch wide, how many books can she fit on the
    7·2 answers
  • Solve: 3<br> +1 − 3<br> = 54.​
    11·1 answer
  • 120<br> Jos<br> David has saved $9.59. His sister<br> has $3.24 less. How much does<br> she have?
    5·2 answers
  • Please help ASAP!! Conner and Jana are multiplying (3⁵6⁸)(3⁹6¹⁰).
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!