Tricia receives a $5 allowance every week. she also earns $6.50 for every hour that she baby-sits. next week, she wants to earn at least $21.25 to buy a present. how many hours will she need to baby-sit?
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Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

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

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)