How do you solve 0.3r = 2.1
i know the answer i just need to show my work

Can someone pls ! pls answer all. no explanation needed..

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)