# Posts by mv

Total # Posts: 24

trig
thank you, the answer is just: =sin(x)

trig
Simplify and write the trigonometric expression in terms of sine and cosine: cot(-x)cos(-x)+sin(-x)=-1/f(x)=f(x)=____________ I've tried everything, I think that the "-1/f(x)" part is screwing up my answer but I'm not sure what it's asking me to do with ...

Finite Math
Determine the 5th term of (2x+3y)^12

Finite math
A newly married couple decides to keep having children until they have a girl. What is the probability that the couple will have at least 5 children?

Finite Math
Working on this for a couple of hours, any help? Input -output matrix F S C F .1 0 .2 S .2 .1 .4 C 0 0 .1 F= Food S=Shelter C=Clothing x=(I-A)^-1(D) 1)What should the total production of the three industries be to generate a \$900,000 surplus each? I gotthe following for 1) F=1...

Algebra2
The function f(t)=100,000/1+5000e^(-t) represents the population of an endangered species bird t years after they were introduced to a non-threatening habitat. a.In what year will there be 70,000 birds? b.How many birds were intially introduced to the habitat? c.How many birds...

Algebra 2
e^(x-2)-12^(2x+3)=0 Class is a college level math prep. Sorry for previous post being incomplete. I'm thinking: ln^(x-2)=ln12^(2x+3) (x-2)ln=(2x+3)ln12 xln-2ln=2xln(12)+3ln(12) xln-2xln(12)= 2ln+3ln(12) and not sure

Algebra
e^(x-2)-12^(2x+3)=0 Class is a college level math prep. Sorry for being incomplete in the post.

Algebra
e^x-2-12^2x+3=0

Algebra2
I believe it may be x=2,x=13

Algebra2
Use properties of logartithms to simplify and solve. Thanks. ln(x-3)-ln(11x-23)+in(x-1)=0

Algebra2
that should be x times the square root of x squared plus one divided by( or fraction bar) x plus one raised to the 2/3 power, all raised to the power of 6

Algebra2
log((x(sqrtã(X^2+1)/(x+1)^(2/3)))^6 Any ideas would be great, thanks

Algebra 2
1.)Find inverse function of the function f(x)=(x+3)+9 2.)Find the inverse of the function r(x)=3x-6/5x+3 thanks

Composite Functions
f(x)=(7x+28)/(x-3) and g(x)=(3x+28)/(x-7) Find: (fog)(x) (gof)(x) (fog)(-1)

Algebra
log[3](2x+8)+log[3](3x)=log[3](2) Need help with this one please, thanks.

Algebra
Let t=50 y=30(2.7)^-0.004t y=30(2.7)^-0.004(50) y=30(2.7)^-.2 Need help with proper technique for using TI-83 to calculate. Thanks

Algebra
The difference between the number of people who speak French and Spanish is 15,637,000 and the difference between those who speak French and German is 155,000, while the total number of people who speak all three is 20,588,000. Determine from information the number of people ...

Algebra
h=7/5d-d^2/100 where h is the height of the arch above the road in meters. Not actually looking to have all completed, but give advice on how to achieve the results a. where does the arch and road come together? b.How far is it from where the arch begins on the left and where ...

Algebra
How do I create a quadratic equation that passes through the points (-1,2),(1,7),(4,5)?

Int. Algebra
The spread of oil leaking from a tanker after t hours is in the shape of a circle with radius r(t) = 200 square root t+3, - 600 (in feet). A. Find the time it takes for the leak to spread at a radius of 1800ft. B. Find the area A of the oil leak as a function of time t.

Chemistry
The answer is correct for 1 which is C. However for Ques 2. it says which element so the answer should be B

Chemistry
A compound containg 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide (CO2) and water. What element should you look at first in balancing this equation? Is the answer a.b.c or d? ...

Chemistry
A compound containg 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide (CO2) and water. What element should you look at first in balancing this equation?