nicole sold half of her comic books then bought 12 more . She now has 25 books. How many did she begin with.

Which statement is always true? a negative exponent cannot be part of an expression's numerator. a negative base raised to the power of 2 has a negative value. a negative base raised to the power of 2 has a positive value. any number to the first power is zero.

Given: ab ≅ bc and ao ≅ oc ok − angle bisector of ∠boc find: m∠aok

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?