Which of the following polynomials corresponds to the subtraction of the multivariate polynomials 19x 3 + 44x 2 y + 17 and y 3 - 11xy 2 + 2x 2 y - 13x 3?
a. y 3 - 6x 3 + 33x 2y + 2x 2y + 17
b.20x 3 - y 3 + 33x 2y + 2x 2y + 17
c.31x 3 - 6x 3 + 44x 2y + 11x 2y + 17
d.32x 3 - y 3 + 42x 2y + 11x 2y + 17

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2