# Hotmath

Classify the given expression as a
*
numerical expression
*
or a
*
variable expression
*
. Name the variable, if it is a variable expression.

*
b
*
+ 7

Classify the given expression as a numerical expression or a variable expression. Name the variable, if it is a variable expression.

10 –
*
n
*

Tom has
*
x
*
mangoes. If Sam has 35 fewer mangoes than Tom, write a variable expression for the number of mangoes Sam has.

In a zoo, there are three times as many tigers as lions.

a) Find the number of tigers if there are
*
x
*
lions.

b) Find the number of lions if there are
*
y
*
tigers.