1] f(x) + g(x)

a) 10x4 +3x2 – 6
b) 10x2 – 13x – 6
c) 10x2 +3x – 6
d) 10x2 +3x + 6

if you are currently hitting at a rate of 30/120, then let x = the number of consecutive hits that you need. This means that the number of additional hits will equal the number of additional at-bats.

(30 + x)/(120 + x) = 28/100 = 7/25

25(30 + x) = 7(120 + x)

750 + 25x = 840 + 7x

18x = 90

x = 5

You need 5 consecutive hits to raise your batting avg. to .280.