Question

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Answer 1

Answers:

a) 5x=5(6)=30

b) 3y=3(-7)=-21

c) 10z=10(0.8)=8

Using the substitution method

Answer 2

Explanation:

Put the values of x = 6, y = -7 and z = 0.8 to the expressions:

a) 5x → 5(6) = 30

b) 3y → 3(-7) = -21

c) 10z → 10(0.8) = 8