At 1:00 a. m., the temperature is −7 oF. Between 1:00 a. m. and 6:00 a. m., the temperature drops by 6 oF. Between 6:00 a. m. and 11:00 a. m., the temperature rises by 13 oF. What is the temperature at 11:00 a. m.?

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