This is my next trigonometry question i am needed on- i just want to be sure i've got it right, or if not, then the steps i need to take to get it right. you.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

Pls the last one and it has to be like number 6