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
aleksandrvk [35]
3 years ago
14

He elimination method is ideal for solving this system of equations. By which number must you multiply the second equation to el

iminate the y-variable, and what is the solution for this system?
x + 3y = 42
2x − y = 14

A.
Multiply the second equation by -3. The solution is x = 12, y = 9.
B.
Multiply the second equation by -2. The solution is x = 12, y = 10.
C.
Multiply the second equation by 2. The solution is x = 15, y = 9.
D.
Multiply the second equation by 3. The solution is x = 12, y = 10.
Mathematics
2 answers:
netineya [11]3 years ago
7 0

Answer:

D. Multiply the second equation by 3. The solution is x = 12, y = 10.

Step-by-step explanation:

First, look at the y variable of the first equation. It is 3y.

To solve by elimination, the variables have to add together to 0.

So, -3y needs to be added to -3y to eliminate the y variable.

The second equation has the y variable of -y, so it has to be multiplied by 3.

So, answer choice D is the correct answer.

motikmotik3 years ago
3 0

Answer:

    D. Multiply the second equation by 3. The solution is x = 12, y = 10.

x+3y=42

+3(2x−y=14)

__________

7x=84

x=12 and since x+3y=42

12+3y=42

3y=30

y=10

So the solution is (12, 10)

Step-by-step explanation:

You might be interested in
Function (A or B) has the greater initial value because the initial value for function A is _ and the initial value for Function
Volgvan

Answer:

Function B has the greater initial value because the initial value for function A is 4 and the initial value for Function B is 5

Step-by-step explanation:

  • <em>The initial value of a function is the output value of the function when the input value is 0</em>

Initial value of A is y=4 at x=0,

and

initial value of B is y=0*6+5= 5 at x=0

Function B has the greater initial value because the initial value for function A is 4 and the initial value for Function B is 5

5 0
3 years ago
Can you guys help me please!!!! I will mark brainliest
Alisiya [41]

Answer:

your answer is going to be a

8 0
3 years ago
This is my hw and it is due at 7!​
AlladinOne [14]

Answer:

1. 60% (decrease by 40%)

3. 30% (decrease by 70%)

5. 250% (Increase by 150%)

7. 40% (Decrease by 60%)

9. 171.4% (increase 71.4%)

11. 152.6% (Increase by 52.6%)

Step-by-step explanation:

1. 20x = 11 = 0.55 rounds to 0.6 => 60%

3. 56 x = 14 = 0.25 rounds to 0.3 => 30%

5. 18x  = 45 = 2.5 => 250%

7. 126x = 48 = 0.38 rounds to 0.4 => 40%

9. 42x = 72 = 1.714 => 171.4%

11. 95x = 145 = 1.526 => 152.6%

8 0
3 years ago
Jim wants to retire in 10 years what amount should he invest today so he can withdraw $25000 at the end of each year for 30 year
Rainbow [258]

after 10 years it will be either $3,526 or 7%

3 0
3 years ago
The area of a square garden is 50 m3. How long is the diagonal?
katen-ka-za [31]

Answer:

10 m

Step-by-step explanation:

If the area of a square is 50 m2, then the length of each side will be \sqrt{50} m, to get the diagonal length, after dividing the square by joining the points of the diagonal with a line, it forms two right angles with length \sqrt{50} m each.

the diagonal length represent the hypotenuse side of each of the right angle, knowing the pythagoras theorem:

(hyp)^{2} = (opp)^{2}   + (Adj)^{2}, so we have:

(diagonal)^{2}  = 50 + 50

(diagonal)^{2}  = 100

diagonal = 10 m

6 0
3 years ago
Other questions:
  • What are the first three terms of the sequence represented by the recursive formula
    14·2 answers
  • Yoku is putting on sunscreen. He uses
    13·1 answer
  • A test has 20 questions. How many do you need to answer correctly in order to get 4/5 of them right?
    13·1 answer
  • You throw your ball into the air from a height of 4.2 feet with an initial vertical velocity of 24 feet per second. Use the vert
    14·1 answer
  • Rounding to the nearest whole number
    13·1 answer
  • Is anyone doing the ukmt maths challenge 2021 right now?
    8·1 answer
  • a mechanist must cut 12 strips of metal that are each 2 ft 4<img src="https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B8%7D" id="TexForm
    7·1 answer
  • Lines a and b are parallel. The slope of line b is 1/3 . What is the slope of line a?
    5·1 answer
  • The quotient of 17 and z
    11·1 answer
  • Here are yesterday's high temperatures (in Fahrenheit) in 12 U.S. cities. 48, 50, 54, 56, 63, 63, 64, 68, 74, 74, 79, 80 Notice
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!