07/19/15

Solving linear equations
Solve (x - 4)  =  (x + 6)            7              6
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07/18/15

Solve this equation: (in description)
A radio active isotope decays according to the exponential decay equation where t is in days.    Round to the thousandths place.    For the half life: The half life is the solution (t) of the... more
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07/18/15

How many use at least one brand?
In a survey of computer users, it was found that 50 use HP printers, 30 use IBM printers, 20 use Apple printers, 13 use HP and IBM, 9 use HP and Apple, 7 use IBM and Apple, and 3 use all three. How... more
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07/16/15

Divide 7-j\10 divide j-7\15
Divide 7-j\10 divide j-7\15
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07/15/15

Using a two sided coin, how many times does one need to flip heads or tails in a row to equal a 1/100,000,000(one in one hundred million) chance?
I could use the formula or expression of consecutively flipping heads or tails on a coin. I could then do the math myself.
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07/15/15

31 students attended five classes in the month of February for a total of 95 sessions. What was the percentage of classes attended for the month?
I need the overall percentage of classes attended by the 31 students. Students may have attended more than one class for the month and that is where the 95 sessions number comes from. 
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07/15/15

Word problem plz><
The percent of maintenance: 14%  The percent of instruction: 70% if the cost of maintenance had been 50percent less and the amount saved had been applied to instruction,theN The increase in the... more
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07/15/15

A poll found that a particular group of people read an average of 15.3 books per year. The pollsters are 99% confident that the result from this poll is..
A poll found that a particular group of people read an average of 15.3 books per year. The pollsters are 99% confident that the result from this poll is off by fewer than 1.62 books from the actual... more
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07/15/15

Probability topic
two dices are thrown simultaneously and getting a number less than 3 on a dice is termed as success. Obtain the probability distribution p(X) such as X=1   (a)1/9(b)2/9(c)3/9(d)4/9 (e)1/3
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07/13/15

Which equation is best represented by the statement "x varies jointly with y and z"?
A) x=kyz B)x=k        yz
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07/13/15

distance of 12 miles. the woman jogs home the same speed. return trip 17 miles. her time is 1 hour longer. find her jogging speed
Help please 
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07/13/15

If oscar drives 4 times faster than pedro rdes his bike, and it takes pedro 2 hours longer to go 40 miles, how fast is pedro going?
If oscar drives 4 times faster than pedro rdes his bike, and it takes pedro 2 hours longer to go 40 miles, how fast is pedro going?
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07/13/15

Permutations
A triangle can be classified according to its sides or according to its angles. There are three side length categories- equilateral, isosceles, and scalene- and three angle categories- acute,... more
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07/13/15

Find Kayla's speed
Kayla and Bill left Perry's house at thesame time. They traveled in oppositedirections. Bill traveled 59.1 mph fasterthan Kayla. After five hours they were504.5 mi. apart. 
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07/12/15

you deposit $40 000 into a retirement account at the age of 20, earning an average of 8% annual interest. How much will you have at the age of 65?
Please help
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07/09/15

Investment Analysis - Probability
Bob, the proprietor of Midway  Lumber, bases his projections for the annual revenues of the company on the performance of the housing market.  He rates the performance of the market as very strong,... more
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07/08/15

Statistics questions
If I have 30 people and a group of six, I want 1 player to be a constant how many groups can I have with that one player being the constant.?
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07/08/15

a skyscraper which has a base that reaches 234 feet below ground rises 1574 feet. What is the building's elevation above ground?
a skyscraper which has a base that reaches 234 below ground rises 1574 feet. What is the building's elevation?
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07/07/15

Watched the lesson 3 times and still don't understand this..... If h(x) is the inverse of f(x), what is the value of h(f(x))
Watched the lesson 3 times and still don't understand this.  I am retaking this class in summer school and feel completely lost.  Please help..... If h(x) is the inverse of f(x), what is the value... more
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07/06/15

A box contains 5 green hats and 4 blue hats and 3 hats are randomly selected from the box. Find the probability that at least one hat is blue.
These problems are usually easy, but I am totally blanking on this. I've tried a handful of ways and got it wrong.
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07/06/15

what is 2?/9 in degrees
How do I sketch the angle of 2Π/9 if I don't know how to convert it from radians to degrees?   
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07/06/15

The sum of two numbers is 47. One of the numbers is 2 more than twice the other number. Find the value of the smaller number.
I am not sure how to set up this problem. I'm confused because it is in word form but i can solve it in equation form. Also, what would the smaller number be?
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07/06/15

Find inf A and sup A where A = {1/n: n is an element of all natural numbers}
Find inf A and sup A where A = {1/n: n is an element of all natural numbers}   I am having difficulty with this question. Would anyone be able to explain the process behind working out the answer?
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06/30/15

probability
In a survey of 26,612 Parade.com visitors, the following question was asked:  How do workers get ahead?  The results of the survey are as follows:  Internal politics - 13,572   Hard work - 7,185  ... more
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06/24/15

Find x representing the length of a rectangle side
A square with sides of length 1 is removed from the end of a rectangle with width 1 and length x. If the resulting rectangle is similar to the original rectangle, find x. The equation found from... more
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