Question 2In which of the following expressions only nu
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Question 2
In which of the following expressions only numbers are used:
(a) y + 3
(b) (7×20)−8z
(c) 5(21−7)+7×2
(d) 5
(e) 3x
(f) 5-5n
(g) (7×20)−(5×10)−45+p
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Right Answer is:
SOLUTION
(c) and (d) are the expressions with only numbers. All the other expressions have variables. A variable is a letter that represents an unknown number which can take any value.