Which mathematical property is demonstrated? 7 + 9 + 3 = 7 + 3 + 9

A. commutative property of addition

B. associative property of addition

C. commutative property of multiplication

D. associative property of multiplication

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Which statement best describes the polynomial

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