Answer:

d. 7

Solution:

By substitution, we will be able to get the answer.

7x - y + 2

7(1) - (2) + 2

7 - 2 + 2

5 + 2

= 7

Question: What is the value of the expression 7x-y+2 when x=1 and y=2?

Answer:

a. 4

b. 5

c. 6

d. 7

Solution:

#BY USING SUBSTITUTION METHOD#

If x=1 and y=2

= 7x-y+2

= 7(1)-(2)+2

= (7)-2+2

= (5)+2

= 7

Understand: In mathematics, replacement or substitution is important because it gives consumers the opportunity, encouraging them to better fulfill their obligations. Substitutes play a very significant role in the economy and are considered as a creating customer satisfaction. Substitution establishes links between the many branches of knowledge.

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