05/12/15

Variations
The number of files N of the same size that a computer's hard disc will hold varies inversely as the size S of the files. Susan's hard disc will hold 1,100 files if each is 160,000 bytes long. How... more
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05/12/15

How many students are in class?
there are two classes.Class A has 18 more students than class B.If 1/8 of class B, both classes would have the same number of students.
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05/11/15

Solve by an equation
jill wants to buy a mat for a photograph that is 14cm by 20cm. She wants to have a even border around the picture when it is mounted on the mat. if the area the the mat she chooses is 352cm how... more
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05/10/15

Chebychev's Inequality
A probability distribution has an EV (mean) of 42, and a standard deviation of 2. Use Chebychev's Inequality to estimate the probability that the outcome of an experiment lies between:   a) 38... more
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05/10/15

Suppose you earn $7.25 per hour woking part-time as a florist. Write and solve an inequality to find how many full hours you must work to earn at least $200.
I need help on this inequalty problem. Thank You
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05/07/15

Joshua got a Easter. he ate one third of it, and on the next day he ate four fifths of the rest. What fraction of the Easter egg did he eat on the second day?
Joshua got a Easter. he ate one third of it, and on the next day he ate four fifths of the rest. What fraction of the Easter egg did he eat on the second day? 
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05/06/15

use the equation to predict how many pages James will read in six hours
in three hours, james read 18 pages of his history book. In four hours, he read 21 pages. write the equation of the line that passes through the two points that represent the data in the problem.... more
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05/06/15

Find the exponential function
f(x)=a^x whose graph goes through the point (2,25)   a=___
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05/06/15

what is the algebraic proof for -1/6 r-5=38
I never under stand how to do the steps for algebraic proof it is so hard for me to write the reason why it happens
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05/06/15

current grade
I am currently at 67.23/80 how do I figure outwear mygrade is and figure out what I need to get on my final which is 20% of my grade. 
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05/05/15

In a certain country, 20 percent if the population has a college degree. Please help me these probability questions.
In a certain country, 20 percent if the population has a college degree. A jury of 12 people is selected at random.   Find the probability that exactly two of the jurors have a college... more
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05/05/15

when P dollars is invested at an annual interest rate r compound once a year, the balance, A, after 2 years is given by A=P91+r)^2
Evaluate A when r=0, and interpret the answer in practical terms   If r is between 5% and 6 %, what can conclude about the percentage growth after 2 years?   Express r as a function of A. Under... more
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05/05/15

How much would you need to invest today in an account earning 6.2% interest compounded quarterly to have a future value of $25000 in 5 years
I need to know the steps to the problem formula 
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05/05/15

Julie powers is a long distance swimmer.She can swim 4 mph in still water.she takes as long to swim 8 miles upstream as 24 miles downstream.how fast is it?
Hard!please help.find how fast the current is.
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05/05/15

Given the following frequency distribution, find the mean, median, mode and standard deviation. draw the histogram.
Score          100     95     90     82 Frequency     1        2       3       4
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05/04/15

A population is normally distributed with µ = 50, s = 8, and N = 10. The mean of the distribution of means =
When I search for how to solve this everything shows for sample not population so I am just confused. I know the simple basics that u=50 is the mean, σ = 8 is standard deviation, and N=10 is the #... more
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05/01/15

How to solve the follow equation 15/m=1/7 / 1/3
How do I solve an equation with a variable in the denominator
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04/30/15

solve problem
Simplify   Log1013
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04/30/15

Whats the domain of 6/x+5
i need to kniw the domain of that function
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04/30/15

You’ve decided you may want to join your Home Owner’s Association (HOA) Governing Board. There are 25 residents (10 males and 15 females) interested in being o
You’ve decided you may want to join your Home Owner’s Association (HOA) Governing Board.  There are 25 residents (10 males and 15 females) interested in being on the HOA board.   8. If the board... more
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04/30/15

what is the speed of the river
a paddleboat can move at a speed of 2 km/hour in still water.  The boat is paddeled 16km downstream in a river in the same time it takes to go 8km upstream.  What is the speed of the river?
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04/30/15

Write and simplify an expression including units to find the total number of people that can ride the coaster.
A roller coaster has 6 trains. Each train has 3 cars, and each car seats 4 people. Write and simplify an expression including units to find the total number of people that can ride the roller... more
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04/30/15

using vertex in graphing a quadratic function
f(x) x^2-x-2  need help
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04/30/15

On the all-state soccer team, 5 of the 8 players from the North REgion are seniors, and 8 of the 12 players from the South Region are seniors. (Continued below)
What is the probability that a randomly-selected student is a senior or is a student from the North Region?   I'm a long-term sub in an Algebra 2 class. If have the solution of 4/5, but I really... more
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04/30/15

A stained glass window has 25 blue pieces and 20 red pieces. If 2 pieces are selected at random, what is P(2 red or 2 blue)?
I'm a long-term sub in an Algebra 2 class.  If have the solution of 49/99, but I really need the process that is used to get there.
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