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
Paraphin [41]
3 years ago
14

If equation one is mutiplied by 2 and then the equations are added the result is 2x+y=3 X-2y=-1

Mathematics
1 answer:
zloy xaker [14]3 years ago
8 0

Question:

2x + y = 3, x - 2y = –1.

If equation one is multiplied by 2 and then the equations are added, the result is _____.

(A) 3x = 2

(B) 3x = 5

(C) 5x = 5

Answer:

Option C:

5x = 5

Solution:

Given equations are

2x + y = 3 – – – – (1)

x – 2y = –1 – – – – (2)

Let us first multiply equation (1) by 2, we get

(1) × 2 ⇒ 4x + 2y = 6 – – – – (3)

Now, add equation (3) to equation (2).

⇒ x – 2y + 4x + 2y = –1 + 6

Combine like terms together.

⇒  x + 4x – 2y  + 2y = –1 + 6

⇒ 5x = 5

So, if equation one is multiplied by 2 and then the equations are added, the result is 5x = 5.

You might be interested in
Slope is 0 and (0,5) is on the line<br> What is standard form please!
stellarik [79]
I think the answer would be 3
4 0
3 years ago
What is the difference 1/8 - 3/10 a.17/40 b.7/40 c.-3/40 d.7/40
UNO [17]

Answer:

c

Step-by-step explanation:

8 0
2 years ago
How many sides does 52 quadrilateral have?
pickupchik [31]
52 quadrilaterals would have 52 ÷ 4 = a
a = your answer.
My answer is reasonable because if you have 52 sides from quadrilaterals you would need to divide by 4 to get the amount of quadrilaterals you have. Check your work by multiplying 4 x a = __ (The blank should be 52)
5 0
3 years ago
ASAP PLEASE!
Kitty [74]
Hello!

You divide the total time by the time unit for the slope

54 / 3 = 18

Multiply this by how height the cart goes

4 * 18 = 72

The answer is 72

Hope this helps!
3 0
3 years ago
Read 2 more answers
Solve this quadratic equation using the quadratic formula. 2x2 - 10x + 7 = 0
frez [133]

Answer:

Step-by-step explanation:

2x^2-10x+7         A=1, B=-10. C=7

-(-10)±√-10^2-4(1)(7)

------------------------------

2(1)

10±√100-28

----------------

2

10±√72

-----------

2

<u>10±8.485281374</u>

         2

<u>10+8.485281374 </u>=9.24

             2

<u>10-8.485281374</u> =0.76

          2

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is 3141413/999999 simplified
    6·2 answers
  • What is the smallest angle of rotational symmetry that maps a regular pentagon onto itself?
    10·2 answers
  • Brainiest to first answer Simplify the expression (4xy^2)^4(-y)^-3
    15·1 answer
  • Which solid figure has seven vertices?
    15·2 answers
  • A toy chest wall hole 78 ft.³ of toys the height of the chest is 4 feet and the width is 3 feet what is the length of the toy ch
    9·1 answer
  • Match the information on the left with the appropriate equation on the right.
    10·1 answer
  • Solve the system of equations using substitution. Show your work. <br> y= 2x - 10<br> y= 4x - 8
    12·1 answer
  • I am one of Jehovah's Witnesses reply if you are to
    8·2 answers
  • Write the equation of the line that is parallel to y=-3x + 5 and goes through (-4,5)
    14·1 answer
  • Distributing the - sign outside the parentheses -(6y-9.6z+3)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!