Liliana takes 4 berths per 10 seconds during yoga. at this rate, about how many breaths would liliana take in 2 minutes of yoga?

Two lines parallel to a third line are parallel to each other. always sometimes or never

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36