Which shows the best use of the associative and commutative properties to make simplifying 2/5 - 15+8 - 1/5 + 3 easier?
O A. [3+ 8 + (-15)) + ((- 6) + 8]
O B. 1}+8+ (-15)] + [3+(-3)
O c. 18+ (- 6)) + (8 + 3+ (-15)
OD. 1} + (-15)) + (8 + (-1) + 3]

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

3 1/3 x 2 3/5 = 8 2/3

step-by-step explanation:

just multiply the first number by the second number to get your answer.

they are simplified

step-by-step explanation: