Answer:
This the answer but it words because i didn't really wanna type all those numbers but just transfer this into numbers and you'll have the simplified version :)
x to the 4 power minus 4x to the third power minus 2x squared plus 12x plus 9
Step-by-step explanation:
Answer: 5x+12.50=62.50
5*12.50=62.50
Step-by-step explanation:
Answer:
the answer is

cause sin²x= 2/25
so cos²x would be 1-2/25= 23/25
then cos x is what I wrote as the answer
Answer:
Increased by 5%
Step-by-step explanation:
Let at the beginning the student's score be
points.
At first, it increased by 40%. So, the new score is

Then it decreased by 25%, so the new score is

At the beginning of a month the score was
and at the end of that month the score was
. Since
the score increased by 