What is 9sm + 4sx if s = 5 and m = 7 and x = 2

If angle 2=3x +1 and angle 3=2x +4what is angle 2

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?