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+3146

[input]33750=-2/(3x^2)+300x[/input]

adminDec 11, 2012

+30

That's even more than good enough. Thanks a lot.

topherDec 11, 2012

Dec 9, 2012

i dont understand how to work out k squared -10k+21

GuestDec 9, 2012

Thank you so much! It is a question in my algebra course, believe it or not.

GuestDec 9, 2012

I dont really understand what you mean when you write that you're meant to find what sin and cos equals. But here's the solution, solving for x.

3 sin^2 (x) = 2sin(x)cos(x)
3sin(x)sin(x) = 2sin(x)cos(x) divide by sin(x)

3sin(x) = 2cos(x) divide by cos(x) and note that sin(x)/cos(x) = tan (x) for all x

3tan(x) = 2

tan(x) = 2/3

x = arctan (2/3) This is not an exact value unfortunately

Hope this helps.

GuestDec 9, 2012

Check what happens at the limits of the function as x goes to infinity.

Well... f(x) = e^x + 2. As x goes to positive infinity, e^x + 2 grows infinitely big, so theres obviously no horizontal asymptote there.

But when x goes to negative infinity, this happens:

[input]e^(-x) + 2 = 1/(e^x) + 2[/input]
As x gets big, e^x gets huge, so 1/(e^x) goes to zero and the function goes to 0+2.

Your horizontal asymptote is f(x)=2

Hope this is clear. Btw, I have no idea how to solve this using algebra, this is a typical calculus question.

GuestDec 9, 2012

f(year) = $500*1.04^(year-1800)

where year is the year and f is the balance at the end of that year.

GuestDec 9, 2012

topher:
How do I create fraction equations without it giving me a decimal answer?

Well, it seems to give you fractional and decimal answers. Is that good enough?[input]2+2/3+5+3/8[/input]

GuestDec 9, 2012

[input](750-3169)/3169*100[/input]The number of cases sold in 2012 was 76.333% less than in 2011.

GuestDec 9, 2012

I guess you mean:

Solve for b1 in:
a=1/2*(b1+b2)

In which case:
a = b1/2 + b2/2
a-b2/2 = b1/2
2*a-b2 = b1

Or, perhaps you mean:

Solve for b1 in:
a=1/(2*(b1+b2))

In which case:
1/a = 2*(b1+b2)
1/(2*a) = b1+b2
1/(2*a) - b2 = b1

GuestDec 9, 2012

Ingeneuer:
(40-j10)x(20-j10)

j is the same as i. Use i in the calculator and also put the coefficient of i in front of it (and use * for multiplication):

(40-10i)*(20-10i)

and you'll have it. Or, by hand:

= 800-200i-400i+(10i)^2
= 800-600i+100i^2
= 800-600i-100
= 700-600i

GuestDec 9, 2012

LauweJoster:

But everytime i fill in 50*10^7 or 5,0*10^8 at 'y=p*a=' it sais i'm wrong.

Why are you doing 5e8? a=8e5.

GuestDec 9, 2012

Dec 7, 2012

44. Roberta owes $7,312 on a credit card with a 26.2% interest rate compounded monthly. What monthly payment should she make to pay off this debt in five years, assuming she does not charge any more purchases with the card?
$219.79
$121.87
$1,923.06
$699.58

Capital:
12x5=60 months
7312/60months=121.87

Interest:
monthly interest rate= 0.262/12=0.02183333
Month 1 interest=0.02183333 x 7,312=146.24

Capital and interest on first month:
121.87+146.24=268.11

Since at the beggining you pay the most interest, you will need to pay less than 268 in later months to pay it off in under 60 months.
Then only value betwee 121.87 and 268.11 is choice A, $219.79

GuestDec 7, 2012

if your rate is 5% then:
total x 1.05=

GuestDec 7, 2012

what is it... i can help

GuestDec 7, 2012

+3146

press enter..
[input]12300000000000000[/input]

adminDec 7, 2012

+3146

3169 cases sold 2011
750 cases sold 2012

[input]100-100*750/3169[/input]

[input]3169-76.3332281476806563584727043%[/input]

adminDec 7, 2012

+30

thanks

topherDec 7, 2012

Yo Brew:
[input][/input]
3169 cases sold 2011
750 cases sold 2012
What is percentage difference between the two years?

GuestDec 7, 2012

Dec 6, 2012

imm sorry bae..

GuestDec 6, 2012

+3146

1/4 + a > -3/4
1/4 + a - 1/4 > -3/4 -1/4
a > -1

[input]plot( 1/4 + x, -3/4, x=-2..2)[/input]

adminDec 6, 2012

yes, bld

GuestDec 6, 2012

http://www.calkoo.com/?lang=3&page=26

english

GuestDec 6, 2012

http://www.calkoo.com/?lang=4&page=26

Maybe this?

GuestDec 6, 2012

Dec 5, 2012

AND WE HAVE TO GRAPH IT

GuestDec 5, 2012

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