Mary has rehearsed her ballet solo for five and a half hours. a week from now, she wants to have rehearsed at least a total of nineteen and a half hours. if she rehearses for the same amount of time each day for the next 7 days, at least how many hours must she rehearse per day?

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