Triangle ABC is similar to triangle DEF. Which problem proportion can be used to find the lengths of DE in centimeters
A) 4/3=DE/9
B) 5/15=DE/4
C) 4/DE=9/3
D) 9/DE=3/5

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 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 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?