How do you translate "one-hundred times a number K decreased by twenty" into a mathematical expression?

1 Answer
Dec 29, 2015

Answer:

#100*K-20#

Explanation:

Let we divide the expression in two parts

(i) One hundred times a number K
(ii) decreased by twenty

(i)
One hundred means 100, times means "multiplied by" #*# a number K means the number is K.
That means one hundred multiplied by K.
#implies 100*K#

(ii) decreased means subtracted #-# by twenty means #20#
#implies -20#

So the full expression becomes #100*K-20#.