Have to FOIL: (3x + y) (2x - y)

Hi there! :)

6x² -xy - y²

--- --- --- --- --- --- --- --- --- --- ---

(3x + y) ( 2x - y)

FOIL: (First, Outer, Inner, Last)

3x(2x) + 3x(-y) + y(2x) + y(-y)

Simplify:

6x² -3xy + 2xy - y²

6x² -xy - y²

Brielle will run the marathon faster.

Brielle = 104.8 minutes  

Joshua = 157.2 minutes

Step-by-step explanation:

Speed rate = distance /time

Brielle = 1.25 /10 = 0.125 miles per minute

Joshua = 1.5/18 = 0.083333 =1/12 miles per minute

Since 0.125 (Brielle) > 1/12 (Joshua)

Brielle will run the marathon faster.

To calculate the time that takes each one to run the entire race (13.1 miles)

Time= distance / speed

Feel free to ask for more if needed or if you did not understand something.