A test consists of 820 true or false questions. If the student guesses on each question what is the mean number of the correct awnsers

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters

Andy has $310 in his account. each week, w, he withdraws $30 for his expenses. which expression could be used if he wanted to find out how much money he had left after 8 weeks?