What’s -2 + -9 = please help me because tomorrow i have a test in math class , about integers and someone please explain too me . thank you if anyone can help

5. (03.02)if g(x) = x2 + 3, find g(4). (2 points)1619811

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters