Can somebody please help me with my math ?

Step-by-step explanation:

just plug in the numbers to the x values

if f(3) then ur equation would look like this f(3) = 4x - 5

then u solve it to get the answer.

  3 = 4x - 5

+ 5 = 4x + 5

---> add 5 on both sides

 8 = 4x

now u just divide. 8 ÷ 4 = 2 so f(3) = 2

6(h+1)/2=a

a=area

step-by-step explanation:

its the same thing as a square or rectangle but after multiplying two sides you need to divide it by two.