# How do you write an inequality for: at least 3 inches of rain?

Feb 13, 2018

Let $r$ equal the amount of rain.

We can then write an inequality as:

$r \ge 3$

Feb 13, 2018

You would use $\ge$

#### Explanation:

You want to make sure that you use a 'greater than or equal to' inequality to match the meaning of 'at least'.

Rain $\ge$ 3 inches

Feb 13, 2018

$x \ge 3$

#### Explanation:

Convert the words into an inequality with $x$ being inches of rain:

${\overbrace{\text{At least}}}^{x \ge}$ ${\overbrace{3 \text{inches}}}^{3}$

$x \ge 3$

Have a nice day!

Feb 13, 2018

x ≥ 3

#### Explanation:

Let $x$ represent inches of rain. Since it says "at least", we know $3$ is the smallest value it can be. This means your answer is

x ≥ 3

since $x$ can be $3$ but can't be any lower than that.