04/01/15

The time it takes to complete a job varies inversely to the number of people working on it.
The time it takes to complete a job varies inversely to the number of people working on it. If it takes 10 carpenters 36 hours to frame a house, how long will it take 22 carpenters to do the same job? more
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04/01/15

Solve this equation by graphing
x=-8 y=4   What is the solution of the system of equations? Select the correct below and, if  necessary, fill in the answer box to complete your choice.   a). ___ (Type an ordered pair.) b).... more
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04/01/15

the failure rate in a statistics course is 20%. in a class of 30 students, find the probability that exactly five students will fail the course
the failure rate in a statistics course is 20%. in a class of 30 students, find the probability that exactly five students will fail the course
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04/01/15

domain of the area
A farmer has 1000 yards of fencing to enclose a rectangular garden. Express the area A of the rectangle as a function of the width x of the rectangle. What is the domain of A?
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04/01/15

Write an equation for 60 ounces plus 1 ounce for each additional ten pounds of weight
 A girl is feeding dogs at a doctor's office. The largest dogs weigh more than a hundred pounds. The feeding chart says to feed them 60 ounces plus 1 ounce for each additional ten pounds of weight.... more
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04/01/15

Statistic word problem
the subjects in a small initial study of this approach were 11 patients whose melanoma had not responded to existing treatments. One outcome of this experiment was measured by a test for the... more
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03/31/15

probability
Two six sided dice are rolled. What is the probability that the sum of the numbers rolled is a multiple of 3 or the dice sum to 9?
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03/31/15

A model of space shuttle is created with a sle of 1:144 inches.If the actual space shuttle has a width of 62.4 feet, what is the width of the model, in inches
Understanding scale drawings and finding the width  
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03/31/15

Angelo had $1.90 in dimes and nickels. If he had 4 fewer nickels than 5 times the number of dimes, now many dimes does he have?
I would appreciate it if someone can solve this and try to show me a simple way to do this and thank you :) 
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03/31/15

Word Problem w/ Distance
Two planes make a 1000 mile flight, one flying 75 miles per hour faster than the other. The quicker plane makes the trip 3 hours faster. How long did it take the slower plane to complete the flight?
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03/31/15

I have to make a histogram for theoretical probability
Exactly that. The probability for each outcome is 25%, and I don't know how to chart that, nor make a histogram. Is there some way to simplify the instructions for making a histogram?
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03/31/15

Compute the Mean & Standard Deviation from percentile values of a distribution
I have been given values for 10%, 50% and 90% of a distribution. From these numbers, how can I compute the mean and standard deviation?   I'll give an example....Temperature distribution 10th... more
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03/31/15

Paid per hour
Duane earned $45 in 2 1/2 hours. How much did Duane get paid per hour?  
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03/31/15

Make a table that shows the additional tax owed over each income span.
The table below gives selected entries from the 2009 federal income tax table. It applies to a married couple filing jointly. Taxable income and tax owed are both in dollars.   Taxable Income:... more
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03/31/15

Please help me solve this limits sum
Find the limit.        lim     (xn + xn-1 + xn-2 + ..... + x-n) / x-1        x-->1                    I need to know whether the answer is n+ n-1+ n-2+....+ 1, and whether it should be... more
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03/30/15

If he types a 15,000 word manuscript at a rate of 50 words per minute, how much will be be paid?
Andre is paid $20 per hour for typing manuscripts.
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03/30/15

Probability
Suppose a subset of 8 different days of the year is selected atrandom. What is the probability that each day is from a different month? (Forsimplicity, assume a year has 12 months and 30 days in... more
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03/30/15

The electrical resistance R of a wire varies directly as its length l and inversely as the square of its diameter d.
(a) Express R in terms of l, d, and a constant of variation k.    I got the equation R=k(l/d^2) which was correct.   (b) A wire 90 feet long of diameter 0.015 inch has a resistance of 25 ohms.... more
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03/30/15

Below is the floor plan for a bedroom. The area is given as well as the expression for width. Choose the correct binomial that expresses the length
Area= x2-x-2 square meters   length = (x-2) meters
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03/30/15

Probability of girls
There are 14 boys and 15 girls in Adrian's class. One person is chosen at random to hand out books to the rest of the class   A) What is the probability that the person chosen to hand out books... more
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03/30/15

1 mol of carbon-12 contains 6.022x10^23 carbon-12 atoms with a mass of 12 g. Calculate the number of carbon-12 atoms in 20.0g of carbon-12.
1 mol of carbon-12 contains 6.022x10^23 carbon-12 atoms with a mass of 12 g. Calculate the number of carbon-12 atoms in 20.0g of carbon-12.
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03/30/15

Im an art dealer specializing in Warhol prints - I need to find a print where there were only 50 produced. What is the probablility I could find one?
 I am a dealer in Andy Warhol prints.  He made one print with only 50 in the edition. They were numbered 1/50 through 50/50. I need to find 3/50  what is the probability of my being able to find... more
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03/30/15

Determine whether the given ordered pair is a solution
Determine whether the given order pair is a solution of the system of the equations. Remember to use the alphabetical order of variables.   (9,7);-9a=-60 b+6a=4     Is (9,7) a Solution to the... more
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03/29/15

Consider the points A(1,5,4), B(3,1,2) D(3,k,2) with AD perpendicular to AB. What is AB, and what is AD with answer in terms of k
vectors are involved dont know what to do.
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03/29/15

problem is below
This is an optimization problem   doug is planning a rectangular garden with roses along the front and a hedge along the other three sides. Along the front he wants an opening which is 5 ft long.... more
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