If z is the principal square root of 8, what must be true? if z is the principal square root of 8, what must be true?
a. z = 82, and z is positive
b. z = 82, and z is negative
c. z2 = 8, and z is negative
d. z2 = 8, and z is positive

Simplify the expression 10/11(22z) + (a+5) -1

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3

Add the fractions and simplify 1/2+ 1/3