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checkley77 answered: 12560 problems
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11430..11459 , 11460..11489 , 11490..11519 , 11520..11549 , 11550..11579 , 11580..11609 , 11610..11639 , 11640..11669 , 11670..11699 , 11700..11729 , 11730..11759 , 11760..11789 , 11790..11819 , 11820..11849 , 11850..11879 , 11880..11909 , 11910..11939 , 11940..11969 , 11970..11999 , 12000..12029 , 12030..12059 , 12060..12089 , 12090..12119 , 12120..12149 , 12150..12179 , 12180..12209 , 12210..12239 , 12240..12269 , 12270..12299 , 12300..12329 , 12330..12359 , 12360..12389 , 12390..12419 , 12420..12449 , 12450..12479 , 12480..12509 , 12510..12539 , 12540..12569, >>NextTrigonometry-basics/153998: I need to subtract two rational expressions, and the problem is
((3a+2b)/(3b)) - ((a+2b)/(6a))
I do not understand how to find the lowest common denominator, and what to do after I do find it. 1 solutions
Answer 113348 by checkley77(12569) on 2008-08-28 17:32:32 (Show Source):
You can put this solution on YOUR website!((3a+2b)/(3b))-((a+2b)/(6a))
[(3a+2b)(6a)-(a+2b)(3b)]/3b*6a
[18a^2+12ab-3ab-6b^2]/18ab
(18a^2+9ab-6b^2)/18ab
3(6a^2+3ab-2b^2)/18ab [cancel out the factor 3 from the numerator & denominator.]
(6a^2+3ab-2b^2/6ab
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Geometry_Word_Problems/153997: Can Someone please help me, I tried to solve this but I not sure of my answer:
Translate the following into a quadratic equation, and solve it: The length of a rectangular garden is three times its width; if the area of the garden is 75 square meters, what are its dimensions?
This is what I got I think it wrong:
3X*X=75
3X^2=75
X^2=75/3
X^2=25
X=SQRT25
X=5 ANSWER FOR THE WIDTH.
3*5=15 ANSWER FOR THE LENGTH.
15*5 = 75
I really need someone help.
Thank you,
J 1 solutions
Answer 113343 by checkley77(12569) on 2008-08-28 17:19:12 (Show Source):
You can put this solution on YOUR website!3X*X=75
3X^2=75
X^2=75/3
X^2=25
X=SQRT25
X=5 ANSWER FOR THE WIDTH.
3*5=15 ANSWER FOR THE LENGTH.
[Proof:]
15*5 = 75
What is your problem? You have a valid proof.
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Human-and-algebraic-language/153972: The Hudson River flows at a rate of 3 miles per hour. A patrol boat travels 60 miles upriver, and returns in a total time of 9 hours. What is the speed of the boat in still water?
1 solutions
Answer 113342 by checkley77(12569) on 2008-08-28 17:15:10 (Show Source):
You can put this solution on YOUR website!distance=rate*time
d=rt
d/r=t
60/(r-3)+60/(r+3)=9
[60(r+3)+60(r-3)]/(r-3)(r+3)=9
60r+180+60r-180=9(r-3)(r+3)
120r=9(r^2-9)
120r=9r^2-81
9r^2-120r-81=0

r=(120+-sqrt[-120^2-4*9*-81])/2*9
r=(120+-sqrt[14,400+2,916])/18
r=(120+-sqrt17,316)/18
r=(120+-131.59)/18
r=(120+131.59)/18
r=251.59/18
r=13.98 mph for the speed of the boat.
proof:
60/(13.98-3)+60/13.98+3)=9
60/10.98+60/16.98=9
5.4645+3.5335=9
9~9
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Trigonometry-basics/153916: Help with sequences, induction and probability?
i have a figure with 4 squares:
square 1: 3 in wide
square 2: 6 in wide
square 3: 9 in wide (yellow)
square 4: 12 in wide
find the probability that a dart will land in the yellow region. 1 solutions
Answer 113302 by checkley77(12569) on 2008-08-28 10:21:17 (Show Source):
You can put this solution on YOUR website!total area=12*12=144in ^2
area of yellow square=9*9=81
area of 6in square=6*6=36
yellow area=81-36=45 in^2
45/144=.3125 or 31.25 % probability of landing on in yellow area.
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Linear-equations/153785: This question is from textbook Mathmematics an applied approach
Plot each pair of points and find the slope of the line containing them. Interpret the slope and graph the line.
(2,0);(2.2) I can graph it but don't under the rest of what the book is asking 1 solutions
Answer 113295 by checkley77(12569) on 2008-08-28 10:00:02 (Show Source):
You can put this solution on YOUR website!(2,0);(2.2)
First we find the slope:
slope=(y2-y1)/(x2-x1)
slope=(2-0)/(2-2)
slope=2/0 this indicates a verticle line through the point x=2.
all the y points on this line contain an x value=2.
Thus: (2,0), (2,15), (2,-5), (2,-8) etc.
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decimal-numbers/153792: Hi. Please explain the following.
Simplify: x-xy
Change to a reduced fraction or mixed number: 2.375 =
Change to a decimal number: 5/8 and 5/6
Convert to a decimal number: 6 1/2% and 3 3/10 - 1 11/15
Thanks! 1 solutions
Answer 113293 by checkley77(12569) on 2008-08-28 09:47:56 (Show Source):
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Quadratic_Equations/153815: the service pool built a pool that was 100ft by 60ft wide. they want to built a sidewalk around the pool and had 450ft of fence. what is the maximum width that the sidewalk can be? 1 solutions
Answer 113291 by checkley77(12569) on 2008-08-28 09:41:08 (Show Source):
You can put this solution on YOUR website!2*100+2*60=200+120=320 is the perimeter of the pool.
2(100+2x)+2(60+2x)=450 this is the perimeter of the pool plus the sidewalk.
200+4x+120+4x=450
8x+320=450
8x=450-320
8x=130
x=130/8
x=16.25 ft is the width of the sidewalk.
proof:
2(100+32.5)+2(60+32.5)=450
2*132.5+2*92.5=450
265+185=450
450=450
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Quadratic_Equations/153816: write an equation to solve this problem.the service pool built a pool that was 100ft by 60ft wide. they want to built a sidewalk around the pool and had 450ft of fence. what is the maximum width that the sidewalk can be? 1 solutions
Answer 113290 by checkley77(12569) on 2008-08-28 09:40:30 (Show Source):
You can put this solution on YOUR website!2*100+2*60=200+120=320 is the perimeter of the pool.
2(100+2x)+2(60+2x)=450 this is the perimeter of the pool plus the sidewalk.
200+4x+120+4x=450
8x+320=450
8x=450-320
8x=130
x=130/8
x=16.25 ft is the width of the sidewalk.
proof:
2(100+32.5)+2(60+32.5)=450
2*132.5+2*92.5=450
265+185=450
450=450
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Quadratic_Equations/153850: write an equation to solve this problem. the service pool built a pool that was 100ft by 60ft wide. they want to built a sidewalk around the pool and had 450ft of fence. what is the maximum width that the sidewalk can be? 1 solutions
Answer 113289 by checkley77(12569) on 2008-08-28 09:38:22 (Show Source):
You can put this solution on YOUR website!2*100+2*60=200+120=320 is the perimeter of the pool.
2(100+2x)+2(60+2x)=450 this is the perimeter of the pool plus the sidewalk.
200+4x+120+4x=450
8x+320=450
8x=450-320
8x=130
x=130/8
x=16.25 ft is the width of the sidewalk.
proof:
2(100+32.5)+2(60+32.5)=450
2*132.5+2*92.5=450
265+185=450
450=450
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Equations/153861: write an equation to solve the problem. the service pool built a pool that was 100ft by 60ft wide. they want to built a sidewalk around the pool and had 450ft of fence. what is the maximum width that the sidewalk can be? 1 solutions
Answer 113288 by checkley77(12569) on 2008-08-28 09:36:52 (Show Source):
You can put this solution on YOUR website!2*100+2*60=200+120=320 is the perimeter of the pool.
2(100+2x)+2(60+2x)=450 this is the perimeter of the pool plus the sidewalk.
200+4x+120+4x=450
8x+320=450
8x=450-320
8x=130
x=130/8
x=16.25 ft is the width of the sidewalk.
proof:
2(100+32.5)+2(60+32.5)=450
2*132.5+2*92.5=450
265+185=450
450=450
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Linear-equations/153911: This question is from textbook elementary & Intermediate Algebra
I would like to see a step by step solving for y=4x. HOw do I figure the plotting points? 1 solutions
Answer 113287 by checkley77(12569) on 2008-08-28 09:28:03 (Show Source):
You can put this solution on YOUR website!y=4x
To find the plotting points make a table assigning a value for x & solving for y:
x------y
1------4 when x=1 then y=4
2------8 when x=2 then y=8
-3-----12 when x=-3 then y=-12
0------0 when x=0 then y=0
now plot these points & you'll have the line y=4x.
 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = 4x).
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Linear-systems/153912: Find the equation of the line, write your answer in slope intercept.
The line goes (1,4) and is parellel to x-2y=6
I have come up with the slope, I believe it is (1/2, -3)Is this correct? 1 solutions
Answer 113286 by checkley77(12569) on 2008-08-28 09:22:37 (Show Source):
You can put this solution on YOUR website!x-2y=6
-2y=-x+6
y=-x/-2+6/-2
y=x/2-3 this line has a slope=1/2
Y=mX+b is the line equation.
Now replace y with (4) & x with (1) & solve for b the y intercept.
4=1/2+b
b=4-1/2
b=3.5 the y intercept.
y=x/2+3.5 This is the equation of the line with a slope=1/2 & passing through the point (1,4)
 (graph 300x200 pixels, x from -8 to 8, y from -10 to 10, x/2 +3.5).
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Linear_Equations_And_Systems_Word_Problems/153807: HELP ME..
juan and peter both leave a shopping center at the same time going in opposite directions. Juan is on his bike and travels 3mps faster than peter who is on his skateboard. after 1.5 hours they are 19.5 miles apart. How fast does peter travel?
answer is.... 5mph
I NEED THE SOLUTION :( 1 solutions
Answer 113193 by checkley77(12569) on 2008-08-27 17:44:16 (Show Source):
You can put this solution on YOUR website!(X+X+3)1.5=9
(2X+3)1.5=9
3X+4.5=9
3X=9-4.5
3X=4.5
X=4.5/3
X=1.5 MPH FOR SKATEBOARDER.
1.4+3=4.5 MPH FOR THE BIKER.
PROOF:
(1.5+1.5+3)1.5=9
6*1.5=9
9=9
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Expressions-with-variables/153805: My homework is about making algebraic statements. Can you please help me with "A rectangle is 5 times as long as it is wide. If it is w feet wide, how long is it? What is the perimeter?" 1 solutions
Answer 113190 by checkley77(12569) on 2008-08-27 17:35:28 (Show Source):
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absolute-value/153798: kelly telephoned brook about a homework problem. Kelly said Four plus three times two is 14,isnt it? brook replied, No its 10. did someone make a mistake?can you explain where these two answer came from? 1 solutions
Answer 113185 by checkley77(12569) on 2008-08-27 17:18:50 (Show Source):
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