Which is a vaild proportion? A 3/4=21/28 B 5/6=29/30 C 4/7=16/49 D 2/5=12/15

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

What are the solutions of the system? y = x^2 + 2x +3y = 4x - 2a. (-1, -6) and (-3, -14)b. (-1, 10) and (3, -6)c. no solutiond. (-1, -6) and (3, 10)

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?