To find f(-20), first figure out which piece x = -20 fits with.
Since -20 < -12, x = -20 first in the domain used by the third piece.
For f(-20), treat this function as if it was just f(x) = 3x-7.
f(-20) = 3(-20) -7
= -60 - 7
= -67
Distributive property
a(b+c)+ab+ac
a(b-c)=ab-ac
(6z^2-4z+1)(8-3z)
move for nicety
(8-3z)(6z^2-4z+1)
distribute
8(6z^2-4z+1)-3z(6z^2-4z+1)=
48z^2-32z+8-18z^3+12z^2-3z=
-18z^3+48z^2+12z^2-32z-3z+8=
-18z^3+60z-35z+8
Answer:
y>4x-4
Step-by-step explanation:
Answer:
2.75 hours
Step-by-step explanation:
Speed is 24km per hour (
), and the bus covered 66km.
We need to get a value of <em>km</em> with the rate (24/1) and distance (66) given.
We get: 
.
The km cancel out, leaving us with 66/24 hours, or 2.75 hours.
