Question

0.9 < -r plz help thank you

Answer 1

0.9 will equal to $\frac{9}{10}$

Anyhow ! Lets get to the steps!

$\frac{9}{10} - r \leq ?$

$\frac{9}{10}$

Now "r" will become a negative 

$\frac{9}{10} - - r \leq ?$

$\frac{-r(10)}{10}$

$\frac{10(r)+9}{10} \leq 0$

 We have to multiply from each of your sides by the number 10

You  can even divide by the number 10 aswell

Back to the steps

$r+ \frac{9}{10} \leq ?$

Subtract from this fraction $\frac{9}{10}$ to your sides 

This would be inequality $r + .900 \leq ?$

$r \ \textless \ -\frac{9}{10}$ ← this should most likely be your answer 

$Now, Good Luck$