Question

TASK 1

love using diffident methods. explained which method you found to be more efficient

a. 3x - 9y = 3
6x - 3y = -24

b. 7x - 3y = 20
5x + 3y = 16

c. y - 1/2x = 6
2x + 6y = 19

Answer 1

You can substitue

Answer 2

Or use matrices.

Answer 3

DO you know how to do both?

Answer 4

a. Use Matrix Method.
b. Use Elimination Method
c. Use Substitution Method

a. Use it because it wouldn't really be more efficient another way.
b. Use it because you can just eliminate the y without multiplying.
c. Use it because you don't have to get rid of a coefficient for y, but just add the 1/2x.