Question

16 Which expression is not equivalent to 20 (n - 5)

A 20n - 5
B 20n – 100
C (n – 5) x 20
D 20 x n - 20 x 5

Answer 1

the answer is A

Explanation:

20(n-5)

i) multiply each term in the parentheses by 20

= ( 20 × n ) - ( 20 × 5 )

= 20n - 20 × 5

ii) multiply the numbers

= 20n - 100