Jamilah took her dog, Tyson, to the vet. Last year, the difference in his weight from the previous year was-2.1 pounds. This year, the difference in his weight from last year was 3.4 pounds. What is the difference in Tyson's weight from 2 years ago?​

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours