04/17/15

Two trains leave towns 483mi apart at the same time and travel toward each other. One train travels 13mi/h faster than the other. If they meet in 3 hou
 Two trains leave towns 483mi apart at the same time and travel toward each other. One train travels 13mi/h faster than the other. If they meet in 3 hours, what is the rate of each train
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04/17/15

Word Problem
An investor has $40,000 to invest in three types of bonds: short-term, intermediate-term, and long-term. How much should she invest in each type to satisfy the given conditions?   Short-term... more
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04/16/15

Moises left Boston driving at 60mph. At the same time, Jorge left Boston driving in the same direction at 80mph.
How long did they drive before they were 120 miles apart?
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04/16/15

Raven leaves New York driving at 30mph. Jetta leaves 2 hours earlier driving 10mph. How long will it take raven to catch up to Jetta?
I would appreciate if I got an answer to this and thank you for your help 
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04/16/15

A sector has central angle 2.11 rads and the ratio of its area to arclength is 3. Find the radius
Help me 
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04/15/15

Math exercise
Solve for x: log(3x+5)=2.
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04/15/15

Math exercise
Solve for t:  100(1.04)^2t = 300
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04/15/15

Math exercise
Using the Laws of Logarithms, combine: log(A)+Clog(B).
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04/15/15

2x+3y=6 what would the x intercept of the function be
Same question but instead of x it's Y
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04/14/15

word problem
The amount of time varies directly with the length of the section of highway and inversly with the number of students who will help. If 12 students clean up 4 miles of highway the project will take... more
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04/13/15

A baseball player's batting average is .200 find the probability that for the next five times at bat he has one hit
This problem is from a binomial theorem worksheet
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04/13/15

Determine the point(s) of intersection of f(theta) = 8sec(2theta) + 4, and g(theta) = 5sec(2theta) - 11 that lie on the interval 0 - 360 degree.
It was on my grade 11 math test, a thinking question, and our teacher never gave answers for it. I'm worried it will be a question for the exam. I'm not sure how to go about it, other than making... more
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04/13/15

Logarithms
log(log(10000^25x))
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04/13/15

Find the sum of the series when it converges
1+2r+r^2+2r^3+r^4+2r^5+r^6...   We we only know how to work with basic geometric series at this point. We are told it converges for |r|<1 so I thought a/(1-r) applies and a is 1.  I don't see... more
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04/13/15

If the z-value for a given value of x
If the z-value for a given value of x of the random variable x is z = 2.12 and x is normally distributed with a mean of 70 and a variance of 25, to what x-value does this z-value correspond?
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04/13/15

A solution of 67% pesticide is to be mixed with a solution of 57% pesticide to form 30 liters of a 59% solution. How much of the 67% solution must she use?
Tell what x= and y=    Give both equations you deduce from the story problem with a bracket.   You may use substitution, elimination, or graphing for the solution to the system. Show all work... more
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04/13/15

math word problem
the equation x^2-0.8x+c=0 has one real solution. Use the discriminate to find the value of c
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04/13/15

2log3x-log3(x+4)=2
2log3x−log3(x+4)=2If the answer is not an integer, enter it as a decimal. Round to the nearest hundredth, if needed. If there are multiple solutions, separate the answers with semicolons (;).
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04/12/15

Solve the following relations for the value of b.
17. 4ab - 5b = 2a 18. | c - ab | < a  Express the answer in set-builder notation.     hicbjecbjehuwbdidbodbiwdbiw
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04/10/15

Paul is four years younger than his brother. In four years, Paul will be three fourths as old as his brother. How old are they now?
Paul is four years younger than his brother. In four years, Paul will be three fourths as old as his brother. How old are they now?
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04/08/15

Shell method
1. The integral 2 π∫(integral 0 to 1, i dont know how to write it in computer) (1-y) y^2dy represents the volume of a solid of revolution. Identify a) the plane region that is revolved and b) the... more
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04/08/15

Math problem
Use the Laws of Logarithms to combine the expression: log2(A)+log2(B)-2log2(C)
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04/08/15

Graphing & standard equation
The general form of the equation of an ellipse is (9x^2) + (4y^2) + 54x - 8y + 49=0. Write the equation of this ellipse in standard form and give the coordinates of the center, the length of the... more
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04/08/15

FInd C and the slope
Consider the function f(x) = 4 -8 x^2 on the interval [ -6 , 4 ]. Find the average or mean slope of the function on this interval, i.e.f(4)- f(-6)/4-(-6)     By the Mean Value Theorem, we know... more
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04/07/15

integrate 4x/x^2 = 1 dx
∫4x/x2+1 dx
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