How do you do these problems ?

Question

Solve the problem. Sandra scored 129 points in 11 games of the basketball season. Find her average points per game. (Round to the nearest whole number, if necessary.)

A ) 1419 points/game
B ) 13 points/game
C ) 1420 points/game
D ) 12 points/game



Problem 2

Multiply. Simplify if possible.

(y^2 - m^2) / ( y + m) * (y) / (y^2 - ym )

Answer 1

(1) D. 129/11 = 11 8/11, which rounds up to 12.

(2) I'd factor first and cancel before multiplying:

(y^2 - m^2) / ( y + m) * (y) / (y^2 - ym )
(y + m)(y - m) / (y + m) * (y) / y (y - m)
(y - m) * 1/(y - m)
1

But you could multiply first, combining the two fractions' numerators, and then factor and implify:

(y^2 - m^2) / ( y + m) * (y) / (y^2 - ym )
[ (y^2 - m^2) * (y) ] / [ ( y + m) * (y^2 - ym )]
[ (y + m)(y - m)(y) ] / [ (y + m)(y)(y - m)]
1

Answer 2

129 / 11 = 12 (rounded)

answer: D) 12 points/game

Answer 3

answerto 1st que is d
(y^2 - m^2) / ( y + m) * (y) / (y^2 - ym)
=[(y-m )(y+m)/( y+m)]*y/y(y-m)
=[(y-m )]*1/(y-m)
=1

Answer 4

D