Write an expression to represent susans age in three years when a represents her present age.

Well, since a is Susan’s current age, we would add three to a to get her age in three years
So our expression would be:
a + 3

Hi there!

The expression you would use would be a + 3.

Because we do not know the age for present so it is unknown. But when you add 3 years to her present age it becomes a expression.

Hope this helps :)

Technically speaking, histograms are another version of bar charts, if you need to work one out then skim through google hope-o that -o!