the administrative assistant at a software company often provides breakfast when there is a morning meeting. For last week's sales meeting, she purchased 9 dozen doughnuts and 9 dozen croissants, spending a total of $135. In preparation for yesterday's safety meeting, she spent $102 on 8 dozen doughnuts and 6 dozen croissants. Assuming she purchased the items at the same bakery both times, how much does a dozen of each cost?​

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the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.