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richwmiller answered: 9133 problems
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Here's how I set up the problem:
a + b + c = 45
3a + 2.7b + 2.25c = 2.8(45)
Eventually, I ended up with no solution, which I am pretty certain isn't the correct answer. My textbook does not have any example problems of this nature, so I don't really have any idea as to how to go about solving them; any help would be greatly appreciated.
1 solutions
Answer 399662 by richwmiller(9144)   on 2012-08-03 21:31:35 (Show Source):
You can put this solution on YOUR website!you have three unknowns
you need at least three equations
c for creme
n for nuts
r for raisins
c+n+r=45
3c + 2.7n + 2.25r= 2.8(45)
Now you need a third equation.
r=2n
c=30., n=5., r=10.
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Linear-systems/634494: When i try the solvers and choose elimination it automatically goes to substitution, i need both in order to complete the problem...i Dont know how so i cant complete the rest of the page!
3x - 5y = 7
2x + 5y = 13
Thank You!
1 solutions
Answer 399655 by richwmiller(9144) on 2012-08-03 20:47:38 (Show Source):
You can put this solution on YOUR website!You add the two equations which gives 5x=20
x=4 now you do substitute 4 for x and solve for y
12-5y=7
subtract 12
-5y=-5
divide by -1
y=1
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Inequalities/634483: solve the linear inequality
x/7 + 3x/14+ is less than or equal to 4/7
what is the solution set (type an inequality use integers or fractions for any numbers in the expression
1 solutions
Answer 399650 by richwmiller(9144) on 2012-08-03 20:40:09 (Show Source):
You can put this solution on YOUR website!Something is wrong with your inequality.
You seem to have an extra +
x/7 + 3x/14+ is less than or equal to 4/7
other it is
x<=8/5
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Miscellaneous_Word_Problems/634416: Devon, Frank, Fua, Morris, and Pedro belong to the same gym. The gym rules prohibit the staff from giving out personal information about their clients. However, each of the five men said just enough that you can figure out their exact weights.
Devon: Pedro weighs 18 pounds more than I do. None of us weighs over 200 pounds.
Frank: My weight is divisible by 7. Morris weighs 12 pounds more than I do.
Fua: Three people are heavier than I am. Pedro's weight is a prime number.
Morris: I'm heavier than Pedro. Devon is the lightest.
Pedro: Morris's weight is divisible by 10. The five of us together weigh a total of exactly 840 pounds.
This is a problem from the textbook "Crossing the River with Dogs" but I'm having a difficult time answering using a problem solving strategy. Thanks!
1 solutions
Answer 399601 by richwmiller(9144) on 2012-08-03 17:36:34 (Show Source):
You can put this solution on YOUR website!Devon - 155
Fua - 164
Frank - 168 7*24=168
Pedro - 173 155+18 (18 more than Devon, and a prime number)
Morris - 180 168+12 180/10=18 (12 more than Frank, and divisible by 10)
Total of 840, all rules met.
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Surface-area/634428: What is the area of this polygon?
Also how do you find it.
http://media.apexlearning.com/Images/200703/05/9baa7e70-ed05-48dc-a006-9da983e3a85d.gif
1 solutions
Answer 399597 by richwmiller(9144) on 2012-08-03 17:20:49 (Show Source):
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Miscellaneous_Word_Problems/634402: Ozark Furniture Company can obtain at most 3000 board feet of maple lumber for making its classic and modern maple rocking chairs. A classic maple rocker requires 15 board feet of maple, and a modern rocker requires 12 board feet of maple. Write an inequality that limits the possible number of maple rockers of each type that can be made, and graph the inequality in the first quadrant.
A chain furniture store faxes an order for 175 modern rocking chairs and 125 classic rocking chairs. Will Ozark Furniture be able to fill this order with the current lumber on hand? If yes, how much lumber will they have left? If no, how much more lumber would they need to fill the order?
1 solutions
Answer 399560 by richwmiller(9144) on 2012-08-03 12:48:12 (Show Source):
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Travel_Word_Problems/634236: Two airplanes depart from the same place at 2 pm. One plane flies north at a speed of 478 km/hr, and the other flies east at a speed of 374 km/hr. How far apart are the airplanes at 4:00 pm?
1 solutions
Answer 399449 by richwmiller(9144) on 2012-08-02 18:39:06 (Show Source):
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Equations/634246: p=8x-16
p=8.8-16
p=64-16
p=48
a square has the same perimeter as the rectangle and triangle I calculated in the problem above. What would be the lenght of the sides of the square? use the formula for calculating the perimeter of a square
1 solutions
Answer 399445 by richwmiller(9144) on 2012-08-02 18:18:56 (Show Source):
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Probability-and-statistics/634196: At General Hospital, nurses are given performance evaluations to determine eligibility for merit pay raises. The supervisor rates the nurses on a scale of 1 to 10 (10 being the highest rating) for several activities: promptness, record keeping, appearance, and bedside manner with patients. Then an average is determined by giving a weight of 3 for promptness, 1 for record keeping, 2 for appearance, and 4 for bedside manner with patients. What is the average rating for a nurse with ratings of 8 for promptness, 7 for record keeping, 7 for appearance, and 10 for bedside manner? (Round your answer to one decimal place.)
1 solutions
Answer 399416 by richwmiller(9144) on 2012-08-02 16:07:23 (Show Source):
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Travel_Word_Problems/634188: Nancy and Mark commute to work, traveling in opposite directions. Nancy leaves the house 8:00am and averages 35 miles per hour. Mark leaves at 8:15am and averages 40 miles per hour. At what time will they be 140 miles apart?
1 solutions
Answer 399415 by richwmiller(9144) on 2012-08-02 16:05:54 (Show Source):
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Triangles/634189: the area of the triangle is 10cm^2,and the base is x+2, and the height is x+1, solve for x
1 solutions
Answer 399412 by richwmiller(9144) on 2012-08-02 15:58:36 (Show Source):
You can put this solution on YOUR website!1/2*(x+2)*(x+1)=10
(x+2)*(x+1)=20
x^2+3x+2=20
x^2+3x-18=0
(x+6)*(x-3)=0
x=-6
x=3
Dismiss negative answers because we are dealing with real measurements.
x=3
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Mixture_Word_Problems/634177: I need an equation for finding the unknown mass to add a substance to a solution, when you have a target concentration.
Ex: I have a solution that weighs 12.0 grams on a balance and I need to know how much mass of a substance to add that nets me 24% by weight of that additional substance in the final solution. (assume sg is =1.0). I am not looking for specifics in molarity or molality.
1 solutions
Answer 399400 by richwmiller(9144) on 2012-08-02 15:08:53 (Show Source):
You can put this solution on YOUR website!If you want the other substance to be 24% then .76x=12
76x=1200
x=300/19
If you want the 12 grams to be 24% then
.24x=12
24x=1200
x=50
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Graphs/634146: Factor each polynomial completely
4-r^2
a^3-2a^2+5a-10
Please help ASAP thanks so much for your time!
1 solutions
Answer 399387 by richwmiller(9144) on 2012-08-02 12:51:09 (Show Source):
You can put this solution on YOUR website!Everyone is in a hurry and everyone wants their problems worked on ASAP.
I might have answered your questions but you violated the rules of the website. One problem at a time please.
I will give you a hint about the first problem. It is of the form a^2-b^2 which factors into (a+b)*(a-b)
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Polynomials-and-rational-expressions/634138: The question I was given was to perform the indicated operation for the rational expression: (3/P)+(1/2)
However, isn't this impossible since you cannot combine like terms? Or would the solution be (4/P+2)?
1 solutions
Answer 399384 by richwmiller(9144) on 2012-08-02 12:41:52 (Show Source):
You can put this solution on YOUR website!Since it is not an equation, you can't solve for p.
All you can do is combine the terms.
The instructions are vague.
Multiply the first term by 2/2
and the second term by p/p
to get a common denominator.
6/2p+p/2p
(6+p)/2p
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Travel_Word_Problems/634025: A farmer drove to the market on friday at an average speed of 60 miles per hour. he returned home on sunday along the same route and averaged 40 miles per hour. if the framer spent a total of two hours driving to and from the market, how many miles did the farmer drive to the market on friday?
1 solutions
Answer 399330 by richwmiller(9144) on 2012-08-02 04:09:01 (Show Source):
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