02/20/15

"How old is Kristen?" using other people's ages for clues.
Kristen is 4 times Claire's age.  Emily is 6 years older than Claire, and 6 years younger than Zack.  If Anna is twice as old as claire, and the total of their ages is 81 - how old is Kristen?
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02/20/15

A population of 2000 fish increases at an annual rate of 7.5%. How many fish will there be in 10 years?
I need help with this algebra problem. Please help me. It would be really appreciated. 
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02/20/15

Need help with my stats homework!
Nine agricultural plots for an experiment are laid out in a square grid (so the picture shown is a 3 by 3 square grid).  Three plots are selected at random.   A)  find the probability that all 3... more
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02/20/15

Static and Kinetic friction
How are the values of the coefficients of static and kinetic friction affected by the area of contact of a body?
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02/20/15

The new hog food supplement increased the weight gain by 2/5 ,if the weight gain used to be 300 pounds, whats the new weight gain?
I do not know how to do this
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02/19/15

derivative of x^cosx
i tried using ax(lna) and got xcosx(lnx) but I'm not sure if that's right or if I'm even done yet.
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02/19/15

Writing equations for lines...
Write an equation for the line tangent to the curve f(x) = 4ex - 7 at x = ln 3   Could someone please explain how I might go about answering this question? Thank you!
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02/19/15

what point on the unit circle corresponds to
what point on the unit circle corresponds to -2π/3   A.(-√3/2,-1/2) B.(-√2/2,-√2/2) C.(-1/2,-√3/2) D.(-1,0)  
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02/19/15

Which angles are coterminal with 5p/4?
Which angles are coterminal with 5π/4? A.π/4 B.9π/4 C.13π/4 D.-3π/4
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02/19/15

Rationalize the denominator. (Simplify your answer completely.)
Rationalize the denominator. (Simplify your answer completely.)     ((square root of 6) + (square root of 5)) / ((square root of 6) - (square root of 5))
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02/19/15

Derivatives of ex and ln x
An example in my textbook goes as follows: f(x)=ln e3x     = 3x f'(x) = 3   I understand that the derivative of 3x is 3, that the derivative of ex is ex, ,and that the derivative of ln x is 1... more
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02/19/15

arithmetic sequence
The model an = 395n + 5419 describes the cost of tuition and fees at public colleges in academic year n, where n = 1 corresponds to the school year ending in 2007, n = 2 to the school year ending... more
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02/19/15

About 1/4 of people in canda live in Quebec.
About 1/4 of people in canda live in Quebec.   A) what fraction of females in canAda live in quebec?   b) express your answer as a decimal   c) what assumption have you made
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02/19/15

ants can hear each other upto range of 2m. an ant at A, 1 m from a wall sees frnd at B about to be eaten by spider. if /_ of elevation of B 4m A is 62.
'll spider 've meal or not?  (Assume B escapes if he hears A calling) (note ; B is on the wall) mathematics  
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02/19/15

Name the letter of the column in which the number 1000 will appear.
Suppose all the counting numbers are written in columns in the pattern shown below.   A       B       C       D      E      F      G 1                2               3              4        ... more
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02/19/15

How many different numbers could Jenny have thought of?
Jenny thinks of a two-digit number. Daniel reverses the digits and when the two numbers are added the total is 143. How many different numbers could Jenny have thought of?   a. 2 b. 4 c. 6 d.... more
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02/18/15

A fishing boat leaves port on a bearing of 35 degrees and travels 13.3 miles. The boat then turns due east and travels 4.0 miles.
A fishing boat leaves port on a bearing of 35 degrees and travels 13.3 miles. The boat then turns due east and travels 4.0 miles. How far is the fishing boat from port and what is it bearing from... more
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02/18/15

Don't understand how to get answer to this question. Please help
Question is linked: http://screencast.com/t/SY7PwB7hIzGZ   I don't get any of those answers using the equations I was shown.    Thanks
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02/18/15

Solution 1
is -2 a solution of 5a-3=-7?
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02/18/15

Domain of (f-g)
given g(x)=2x^2+5 and f(x)=-12x+1/2x find : (f-g)(-x)
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02/18/15

How many different answer sheets can be submitted?
For this problem, assume the test had 7 true-false questions and 7 multiple-choice questions, and that each multiple-choice question had 5 choices.
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02/18/15

How many ways can you pick the cars so not all are the same size?
For this problem, assume that you are to pick 3 cars from the motor pool, which contains 8 subcompact cars, 8 compact cars, and 5 midsize cars.
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02/18/15

(1) How many different casts are there? (2) How many of these casts include Sally?
involving the casting of a play in a community theater. Assume that there are 8 unfilled roles: 3 male and 5 female. There are 6 men and 9 women, including Sally, auditioning for a part in the play.
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02/18/15

Why do proportional relationships have to have a positive slope?
I understand that proportional relationships must go through the origin, must have a positive slope, and must have a constant of proportionality. But WHY a positive slope?
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02/18/15

more probalility
 There are eight question on a matching test (exactly one answer is paired with one question) . What is the probability that someone who guesses on all five questions will answer them all correctly?
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