220k views
5 votes
90 POINTS PLEASE HELP

Addition Methods multiple choice 5 questions please solve all (see pictures)

90 POINTS PLEASE HELP Addition Methods multiple choice 5 questions please solve all-example-1
90 POINTS PLEASE HELP Addition Methods multiple choice 5 questions please solve all-example-1
90 POINTS PLEASE HELP Addition Methods multiple choice 5 questions please solve all-example-2
90 POINTS PLEASE HELP Addition Methods multiple choice 5 questions please solve all-example-3
User Divramod
by
7.4k points

1 Answer

3 votes

Answer:

1. None of the above

2. 2

3. 2

4. 6

5. No solution

Explanation:

2x+3y=8 (1)

-6x+4y=11 (2)

3(1) + (2)

6x + 9y = 24

-6x + 4y = 11

13y = 35

y = 35/13

x = -1/26

3x-y=3 (1)

-2x+2y=6 (2)

2(1) + (2)

6x - 2y = 6

-2x + 2y = 6

4x = 12

x = 3

y = 3(3) - 3 = 6

3x+4y=-10 (1)

5x-2y=18 (2)

(1) + 2(2)

3x + 4y = -10

10x - 4y = 36

13x = 26

x = 2

5x-2y=3 (1)

2x-y=0 (2)

(1) - 2(2)

5x - 2y = 3

-4x + 2y = 0

x = 3

2(3) - y = 0

y = 6

3x+2y=10 (1)

6x+4y=14 (2)

2(1) - (2)

6x + 4y = 20

6x + 4y = 14

0 = 6 is a false statement so no solution

User Alex De Groot
by
9.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories