QUIZ 6 CRN10113 MATH 65 SU14 SEC 083

1. DETERMINE WHETHER THE ORDERED PAIR IS A SOLUTION OF THE SYSTEM OF EQUATIONS.

(1,4); 5x – 2y = -3

7x – 3y = -5

SOLVE THE NEXT PROBLEMS USING THE SUBSTITUTION METHOD

2.
x + y = 5

y = x + 1

3.

x = y – 6

3x + 2y = 2

SOLVE THE NEXT PROBLEMS USING THE ELIMINATION METHOD

4.

x - y = 2

x + y = 4

5.
x – y = 3

2x – 3y = -1

SOLVE USING THE SUBSTITUTION OR ELIMINATION METHOD:

6. JEROME’S EXPERIMENT REQUIRES HIM TO MIX A 50 % ACID SOLUTION WITH AN 80 % ACID SOLUTION TO CREATE 200 -oz. OF A 68 % ACID SOLUTION. HOW MUCH 50 % SOLUTION (called x) AND HOW MUCH 80 % ACID SOLUTION (called y) SHOULD HE USE? IN OTHER WORDS, SOLVE FOR x AND y.