Question

Evaluate each expression using the values

a=7 and b=4

1) 14+a
2) ab
3) 5b-a

Answer 1

1) 21

2) 28

3) 13

Explanation:

According to the word problem, a=7 and b=4.

Now, we just plug in the numbers.

14 + 7 = 21

7 ⋅ 4 = 28

5 ⋅ 4 - 7 = 13

ANYTIME YOU SEE TWO VARIABLES (LETTERS) TOGETHER, THAT MEANS MULTIPLY THEM.

AN EXAMPLE OF THIS IS NUMBER 2.