Remark
There are occasions where this is very handy to know. Use FOIL.
Solve
F: (First): x*y = xy
O: (Outside): x *(-9) = - 9x
I:(Inside): (-7)*y = - 7y
L:(Last): (-7)*(-9) = 63
Add the terms together
xy - 9x - 7y + 63 <<<< Answer
Answer:
0.25 laps per minute
Step-by-step explanation:
As suggested by the "laps per minute", the question is asking how many laps are ran each minute. Laps per minute is synonymous for laps/minutes. Thus, 2 laps in 8 minutes is 0.25 laps per minute.
Scale factor for volume = A^3:B^3
(1:4)^3 = 1:64. The volume is 64x bigger.
Relative frequency = (number of times an item appears) /(TOTAL numbers)
Relative frequency (selecting Red ) = 13/30 =0.434
