.Find the value of variable (k) if Y is between X and Z XY = 3k - 2, YZ = 7k + 4 and XZ = 4k + 38

Math i have no idea how to do a and b

In an equilateral triangle, each angle is represented by 5y+3. what is the value of y? a. 9.7 b. 10.8 c. 11.4 d. 7.2

Five friends found a dollar on the ground and decided they each should get 1/5 of it. what amount of money will each friend get? $0.05 $0.20 $0.30 $0.80