Question

18.
For which system of equations would elimination be the simplest technique to choose?
(Points : 2)

y = 2x and x + 3y = 5


4x + 3y = 6 and 3y = 5


x + y = 7 and x - y = 12


3x - 2y = 8 and 4x - 5y = 20


19.
Substitution would be the simplest method of solution for which system?
(Points : 2)

5/3 x = 6y and 2x -3y = 8


y = 2x and x + y = 28


3x - 2y =18 and 4x + 5y =60


20.
The sum of two numbers is 110. Their difference is 28. What is the smallest of the two numbers?
(Points : 2)

56


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