Question 1107421: The battery for Kyle's cell phone lasts at least
twice as long as the battery for his brother's
cell phone. His brother's battery lasted 8 hours.
Which of these inequalities is another way to
express this relationship?
K = number of hours the battery lasts in Kyle's cell phone
A. K < 2 8 B. K 2 8
C. 2K > 8 D. 2K 8
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! let K equal the number of hours that kyle's cell phone battery lasts.
let B equal the number of hours that his brother's cell phone battery lasts.
kyle's battery last at least twice as long as the battery for his brother's cell phone.
that gets you K >= 2 * B.
his brother's battery lasted 8 hours.
that gets you K >= 2 * 8 which gets you K >= 16.
your selections are shown as:
A. K < 2 8
B. K 2 8
C. 2K > 8
D. 2K 8
you're mising some key operands.
my guess as to what they are is shown below:
A. K <= 2 * 8
B. K >= 2 * 8
C. 2K >= 8
D. 2K <= 8
without knowing exactly what your final equations are like because of the missing operands, i would guess that selection B would be correct, because:
K >= 2 * B
B = 8
this results in K >= 2 * 8.
|
|
|
