What ordered pair represents a solution to both equations?

Ihave a 69 and an 82. the 69 is worth 40% of my grade and the 82 is worth 15%. can someone tell me my current average grade.

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

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row