Simplify: 3(2x-y)-(5x+4y-2)
Please show steps

6 x ^2 − 5 x y − 4 y ^2

Step-by-step explanation:

Expand  

( 2 x + y ) (3 x − 4 y )

using the FOIL Method.

Apply the distributive property.

2 x ( 3 x − 4 y ) + y ( 3 x − 4 y )

Apply the distributive property.

2 x ( 3 x )+ 2 x (− 4 y ) + y ( 3x − 4 y )

Apply the distributive property.

2 x ( 3 x ) + 2 x( − 4 y ) + y ( 3 x) + y ( −4 y )

Simplify and combine like terms.

6 x ^2 − 5 x y − 4^ 2

Means that after 32 days, it is halved

A=P(1/2)^(t/h) is the half li fe formula

A=furter amount
P=starting amount
h=half life
t=time

so

given
starting amount=361
time=5 days
half life is 32

A=361(1/2)^(5/32)
use calculator
A=323.9449
round
A=323.95

323.95kg left