My question is BELOW so answer is pls due today

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate

3.4a=57.8 what is the the value of a