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richwmiller answered: 9124 problems
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Miscellaneous_Word_Problems/732137: a store mixes Kentucky bluegrass worth $11 per pound and ryegrass worth $15 per pound. the mixture is to sell for $12 per pound. Find how much of each should be used to make a 540-pound mixture.
1 solutions

Answer 447559 by richwmiller(9135) on 2013-03-30 23:43:47 (Show Source):

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b+r=540,
11b+15r=540*12
b = 405, r = 135

Length-and-distance/732134: What is the distance between the points (7, –6) and (–5, 3)?
I tried the distance formula but i dont no what i did wrong .
1 solutions

Answer 447558 by richwmiller(9135) on 2013-03-30 23:38:43 (Show Source):

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what answer did you get?
What makes you think it is wrong?

Quadratic_Equations/731868: Hello I'm kind of confused on how to solve this; What are the solutions to the equation +1%2B+1%2Fx%5E2=+3%2Fx+

I don't know how to turn this into a quadratic equation to use with the quadratic formula.
Thanks.
1 solutions

Answer 447323 by richwmiller(9135) on 2013-03-29 19:19:56 (Show Source):

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multiply by x^2
+x%5E2%2B+1=3x+

rearrange

4/5 (x-3/2)^2 = 1
(x-3/2)^2 = 5/4
x = 1/2 (3+sqrt(5))
x = 1/2 (3-sqrt(5))

Age_Word_Problems/731768: a father is 5 times as old as his son, his son is 6 years old, after how many years will the father be 4 times as old as his son?
1 solutions

Answer 447284 by richwmiller(9135) on 2013-03-29 12:53:09 (Show Source):

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5s=f,
s=6,
5*6=30=f
f+x=4(s+x)
30+x=4*(6+x)
30+x=24+4x
6=3x
2=x
check
30+2=4*(6+2)
32=4*8
32=32
ok

Age_Word_Problems/731751: My granddaughter is about as many days as my daughter is weeks, and my granddaughter is as many months as I am years. My granddaughter, my daughter, and my age are equal to a century. What is my age in years?
1 solutions

Answer 447279 by richwmiller(9135) on 2013-03-29 12:33:07 (Show Source):

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g+d+m=100,
365g=52d,
12g=m
d = 36500/1041, g = 5200/1041, m = 20800/347=62400/1041
d=35.0624399615754, g=4.99519692603266, m=59.9423631123919
d=35 g=5 m=60
check
5+35+60=100
52*d=1820
1820/5=364
1825/365=5
5*12=60
ok
the key is "about as many days"

Money_Word_Problems/731770: You have a coupon worth $18 off the purchase of a scientific calculator. At the same time, the calculator is offered with the discount of 15% but no other discount may be applied. For what priced the calculator do you pay the same amount for each discount?
1 solutions

Answer 447271 by richwmiller(9135) on 2013-03-29 12:08:33 (Show Source):

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.15X=18
x=18/.15
x=120
.15*120=18
15 % discount on $120 is $18

Permutations/731274: In how many ways can you choose 2 side dishes from 15 entrees?
1 solutions

Answer 447075 by richwmiller(9135) on 2013-03-27 20:13:21 (Show Source):

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That depends on how you look at it.
Have you already taken your entree?
or are all of the 15 available for side dishes
first side dish has 15 choices
can you repeat the the side dishes?
no repeat
then there are 14 choices for the secind
15*14=210 choices for 2 side dishes
if all 15 are available for the first and 14 (no repeats) are available for the second

Geometry_Word_Problems/731276: "The perimeter of a rectangle is 36 m. The area is 65 m^2. Find the dimensions of the rectangle."
I'm supposed to use the Quadratic formula in this somehow, but I don't really understand how I get A, B, and C from this. I tried to do it, and I confused myself halfway through it. Thank you for your help!
1 solutions

Answer 447067 by richwmiller(9135) on 2013-03-27 19:54:47 (Show Source):

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2l+2w=36
l=65/w
2*(65/w)+2w=36
65/w+w-36=0
65+w^2-36w=0
w^2-18w+65=0
factor
(w-5)*(w-13)=0
w = 5
width is shorter than length
l=13

Miscellaneous_Word_Problems/731282: If a 32ft rope is cut into two sections with one section 7 times as long as the other section, how long is the shorter piece?
1 solutions

Answer 447065 by richwmiller(9135) on 2013-03-27 19:44:27 (Show Source):

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short 4 and long 28

test/731281: If John was traveling 42 miles in 312 hours. How fast was he riding?
1 solutions

Answer 447063 by richwmiller(9135) on 2013-03-27 19:38:29 (Show Source):

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0.13461538461538461538461538461538 mph

Mixture_Word_Problems/730992: Please,i will like to know how mixing problem involving tank 1 and tank 2 is all about
1 solutions

Answer 447023 by richwmiller(9135) on 2013-03-27 14:35:15 (Show Source):

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It is about filling and emptying two tanks

Mixture_Word_Problems/731178: How much 3% peroxide do you add to one litre water to make a 30% solution peroxide.
1 solutions

Answer 447020 by richwmiller(9135) on 2013-03-27 14:20:20 (Show Source):

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I think you have the numbers confused.

Linear_Equations_And_Systems_Word_Problems/731095: How do you write 16 added to a number and the sum is doubled, the result 15 less than the number
1 solutions

Answer 447018 by richwmiller(9135) on 2013-03-27 14:18:29 (Show Source):

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2*(16+n)=n-15
32+2n=n-15
subtract n from both sides
subtract 32 from both sides
n=-47

Linear_Equations_And_Systems_Word_Problems/731174: In the equations below, a is the price, in dollars, of an adult ticket to a school play, and s is the price of a
student ticket.
5a + 3s = 42
3a + s = 22
What is the price of an adult ticket to the play?
A. $4
B. $5
C. $6
D. $10
Padgett Math 1 (Padgettmath1)
2
1 solutions

Answer 447017 by richwmiller(9135) on 2013-03-27 14:12:47 (Show Source):

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a=6 s=4
That would be C. $6

Rate-of-work-word-problems/731045: Please help me solve this equation: It takes 4 men 16 hours to pave a footpath. How long would it take 3 men to pave the same area?
1 solutions

Answer 447015 by richwmiller(9135) on 2013-03-27 14:03:01 (Show Source):

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There is no equation to solve.
It is a rate of work word problem.
4*16=64 man hours are needed
It is assumed in this type problem that everyone works at the same rate.
64/3=21 1/3 hours for 3 men

Rate-of-work-word-problems/731168: 4 people can paint 5 walls in 39 minutes.
How many minutes will it take for 6 people to paint 9 walls?
1 solutions

Answer 447009 by richwmiller(9135) on 2013-03-27 13:46:10 (Show Source):

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4*39=156 man minutes for 5 walls
156/5 man minutes per wall
156/5*9/6= 46.8 minutes

Travel_Word_Problems/731136: If the distance a train travels varies directly with the time the train travel,and if the train travels 51 miles in 45 minutes ,how far does the train travel in 2 hours

1 solutions

Answer 447006 by richwmiller(9135) on 2013-03-27 13:25:13 (Show Source):

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r*t=d
r*3/4=51
r=51/3/4=51*4/3=68
2*68=136 miles in 2 hours

Travel_Word_Problems/731146: My car gets 41 MPG, and i'm traveling 1,666 miles.Would it be cheaper to drive or fly? If a plane ticket is four hundred dollars.
1 solutions

Answer 447005 by richwmiller(9135) on 2013-03-27 13:13:54 (Show Source):

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1666/41=40.63 gallons
let's say at $4.50 a gallon
$182.85
driving if you only consider gas and not the wear and tear on the car, oil etc

Rate-of-work-word-problems/730748: Americo can mow a lawn in 20 minutes,while Brandon takes 30 minutes to mow the same lawn. How many minutes would it take the two people together to mow the lawn?
1 solutions

Answer 446951 by richwmiller(9135) on 2013-03-26 22:32:29 (Show Source):

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1/20+1/30=1/x
x=12

Rate-of-work-word-problems/730979: sally can paint a room in 3 hours white it takes steve 4 hours to paint the same room. How long would it take them to paint the room if they worked together?
1 solutions

Answer 446949 by richwmiller(9135) on 2013-03-26 22:29:07 (Show Source):

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x/3+x/4=1
or
1/3+1/4=1/x
4/12+3/12=1/x
7/12=1/x
12/7=x

Finance/730990: If I may ask, what is the answer to this problem: A community bird-watching society makes and sells simple bird feeders to raise money for its conservation activities. The materials for each feeder cost $4, and the society sells an average of 40 per week at a price of $8 each. The society has been considering raising the price, so it conducts a survey and finds that for every dollar increase, it loses 2 sales per week.
1 solutions

Answer 446947 by richwmiller(9135) on 2013-03-26 22:22:18 (Show Source):

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what is the question?

Length-and-distance/730974: A ball is thrown upward from the top of a building. The ball's height above the ground after t seconds is given by the function: h (t) = -16t^2 + 48t + 32.
a.) What is the initial height?
b.) How high did the ball go?
c.) When does the ball hit the ground?
1 solutions

Answer 446945 by richwmiller(9135) on 2013-03-26 22:11:20 (Show Source):

Quadratic_Equations/730817: Find solutions of the equation 4x^2+27x=40
1 solutions

Answer 446857 by richwmiller(9135) on 2013-03-26 16:19:58 (Show Source):

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x = 5/4
x = -8
use complete the square or quadratic equation to solve

decimal-numbers/730803: How to solve 4/25 into a mixed number as decimals
1 solutions

Answer 446854 by richwmiller(9135) on 2013-03-26 16:03:57 (Show Source):

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4/25=8/50=16/100=0.16

Linear-equations/730677: how do yow write in y form ex: y-4x=6
1 solutions

Answer 446810 by richwmiller(9135) on 2013-03-26 13:28:04 (Show Source):

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add 4x to both sides

Linear-equations/730739: x-3y+3=0
I am supposed to put this into slope intercept form and then find three coordinates for (x,y). I THINK I am doing the math correctly, but I so far I have come up with THREE different solutions for (x,y). Also, when I go to graph this on my online homework, the answers are wrong. My tutor will not be here until five, and I really want to learn how to do this to the best of my ability so that my tutor and I can spend more time on the other things I am struggling with. Can you include the three correct points on a picture of a graph so I can see what it looks like? Any help is very much appreciated. Thank You.
Sincerely,
Tiff
1 solutions

Answer 446809 by richwmiller(9135) on 2013-03-26 13:22:52 (Show Source):

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There are an infinite number of solutions.
You didn't tell us what you did nor give us your solutions,

Travel_Word_Problems/730617: Simon walked at 50m/min and then rode his bike at 200m/min for the rest of the way.If it took 33 minutes to complete the whole journey of 3 km, for how long did he walk?
1 solutions

Answer 446776 by richwmiller(9135) on 2013-03-26 09:08:29 (Show Source):

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W+B=3000,
50*w=W,
200b=B,
We have more info than we need.
We only need
w+b=33,
50*w+200b=3000,
b=9 min
w=24 min

Word_Problems_With_Coins/730188: Joe has 13 coins made up of quarters and half dollars, and their total value is $6.00. How many quarters does he have?
1 solutions

Answer 446571 by richwmiller(9135) on 2013-03-25 09:21:04 (Show Source):

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q+h=13
50h+25q=600

Percentage-and-ratio-word-problems/730207: if 26 students out of 50 students prefer maths to English, what is the percentage of students that prefer maths?
1 solutions

Answer 446568 by richwmiller(9135) on 2013-03-25 09:18:37 (Show Source):

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26/50=52/100 = 52%

Reduction-of-unit-multipliers/730214: how to get the answer to this question. a*b=a+b/2+5
1 solutions

Answer 446560 by richwmiller(9135) on 2013-03-25 09:15:39 (Show Source):

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where is the question?

Probability-and-statistics/730224: in a fifty question true false examination a student must achieve twenty five correct answers required to pass.
1 solutions

Answer 446554 by richwmiller(9135) on 2013-03-25 09:10:00 (Show Source):

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