Six books are to be placed in a 3-tier triangular shelf. How many ways can this be done if the top teir can hold one book, the second tier can hold two books, the third teir can hold three books. (topic: permutation and combination)

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Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189

Sh what is the value of x? ox= 2.25 x = 11.25 ox= x = 22 1 (2x + 10) seo - (6x + 1) -- nie