Answer:
Step-by-step explanation:
we would like to solve the following using double-angle formula:
there're <u>4</u><u> </u>double Angle formulas of cos function which are given by:
since the question doesn't allude which one we need to utilize utilize so I would like to apply the second one, therefore
step-1: assign variables
to do so rewrite the given function:
so,
Step-2: substitute:
recall unit circle thus cos300 is ½:
simplify square:
reduce fraction:
simplify substraction and hence,
Answer: x < -125
Step-by-step explanation:
-4x / (-4) < 500 / (-4)
x < -125
Answer:
day
Step-by-step explanation:
Given that:
Owen who is an alien has only 4/5 of his socks clean.
and he wears 2/5 socks a day.
Out of his total 4/5 clean socks.
It will take him (4/5 ÷ 2/5) days to wash all his socks
i.e
the numbers of days since he washed all his socked is:
=
=
=
Answer:
400
Step-by-step explanation:
8 out of 10 remember their chargers ( multiply by 10 )
80 out of 100 remember their chargers ( multiply by 5 )
400 out of 500 remember their chargers