CAN SOMEONE HELP ME PLS

What is 20+(5 x 2/5 )+ 3 show your work

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?