Equivalent fractions using the lcd 7/10 and 2/5

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?