Select the correct choices to complete the sentence. A contestant on a game show will choose one envelope at random. The table shows the prize distribution of the envelopes.

Prize Number of Envelopes
$0 38
$5 20
$25 10
$100 6
$1,000 1

The theoretical probability that the contestant will win $100 is , 1 of 1.
Select Choice
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Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

How do i i solve this equation? -18 = x/3 + 3