<h3>I'll teach you how to solve 4x^2-25<0</h3>
-------------------------------------------------
4x^2-25<0
Add 25 to both sides:
4x^2-25+25 < 0+25
Simplify:
4x^2 < 25
Divide both sides by 4:
4x^2/4 < 25/4
Simplify:
x^2 < 25/4
whole sqrt -25/4 < x < whole sqrt 25/4
whole sqrt 25/4= 5/2
-5/2 < x < 5/2
Your Answer Is -5/2 < x < 5/2
plz mark me as brainliest if this helped :)
It is 6 for number 9 glad I could help
s = hours it takes the small pipe on its own.
L = hours it takes the large pipe on its own.
we know the small pipe can do it in 11 hours total, so s = 11, so, how much of the whole job has the small done in 1 hour only?
well, if it takes 11 hours to do the whole thing, in 1 hour it has done only 1/11 of the whole job.
we know both pipes working together can do it in 6 hours flat. So in 1 hour only, both of them have done only 1/6 of the whole thing.
in that 1 hour, how much has the large one done? well, it has only done 1/L of the job.
and you can round that up as needed.
Answer:
$9 or 9% less
Step-by-step explanation:
Original Price = OP
$75= OP
75 x .2 (20% discount) = 15
$15 discount
$75 - $15 = $60
$60 x .1 (service fee) = 6
$60 + $6= $66
Op ($75) - $66 = 9
$9 less than OP
How I check the percentage (probaly not how ur supposed to but ah well)
75 = 100%
75 + 25 = 100 but 25 more than 100%
66 + 25 = 91, also makes 75 100% again
100%-91%=9%
