A survey found that 1/3 of Mills Middle School seventh graders preferred round chocolate candy to hard candy. When Jennifer duplicated the survey, 4/5 of the students changed their preference from chocolate candy to hard candy. What fraction of the students in the second survey preferred the round chocolate candy?

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12