Will the opposite of a positive number always sometimes or never be a positive number

Student price tickets to a movie are $1 and non student tickets are $2 . 350 tickets are sold and the total amount made is $450. there were 250 student tickets sold . true or false .

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong