Algebra problems 30 to 39


to problems 21 to 30
to problems 40 to 49

30.
Solve x if :
6x = 32x - 22x



31.
Prove that
    tan(10) + tan(20) + tan(50) = tan(60)


32.



"als" = "if"
"bereken" = "calculate"



33.
Calculate (without calculator) x if





34.
Given is:

a + b + c + d = 4
ab + ac + ad + bc + bd + cd = -7

Calculate:

a2 + b2 + c2 + d2



35.
Find values for x and y which satisfy:





36.
Calculate using pencil and paper:





37.

Find P(x) if P(x+1) - P(x) = x



38.

Given:



Calculate





39.

Given:



Calculate: