298,196,248,379,319,279,198,349. What is the first quartile, second quartile, and the interquartile range.

5.(04.07) two different plants grow each year at different rates, which are represented by the functions f(x) = 4* and g(x) = 5x + 2. what is the first year the f(x) height is greater than the g(x) height? year 3 year 0 year 2 year 1

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

Could somebody me with this radical simplification?