Please help me please!

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

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

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.