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checkley75 answered: 3664 problems
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Expressions-with-variables/85367: Solve each of the following by subtraction.
5x – 2y = -5 y – 5x = 3
8x – 4y = 16 y = 2x – 4
4x – 12y = 5 -x + 3y = -1
10x + 2y = 7 y = -5x + 3
1 solutions
Answer 61552 by checkley75(3666)   on 2007-06-14 10:34:32 (Show Source):
You can put this solution on YOUR website!5X-2Y=-5
-5X+Y=3
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-Y=-2
Y=2 ANSWER.
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8X-4Y=16 NOW MULTIPLY THE SECOND EQUATION BY 4 & ADD.
-8X+4Y=-16
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0X+0Y=0 NO SOLUTION AS THESE ARE THE SAME EQUATION WITH 2 UNKNOWNS.
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I'LL LEAVE THE REST FOR YOU TO MASTER.
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Equations/85330: One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.
This is where I started with trying to make an equation then I gave up on that and tried doing it the old fashioned way of using my thinking skills and I came up with 17 as my answer. Is it right?
x>12
39=y(2x)
1 solutions
Answer 61525 by checkley75(3666) on 2007-06-13 20:58:59 (Show Source):
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Equations/85333: Which of the ordered pairs is a solution for the equation 5x – 2y = 10?
(0, 5)
(–2, 0)
(–2, –5)
(0, –5)
Here is what I got:
(0, –5)
1 solutions
Answer 61524 by checkley75(3666) on 2007-06-13 20:52:18 (Show Source):
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Pythagorean-theorem/85185: Find the length x. Express your answer in simplified radical form.
side 1: 51ft
side 2: 45ft
side 3: x
Help!
1 solutions
Answer 61511 by checkley75(3666) on 2007-06-13 18:48:40 (Show Source):
You can put this solution on YOUR website!IF THIS IS A RIGHT TRIANGLE & THE X=THE HYPOTENUSE THEN WE HAVE:
51^2+45^2=X^2
2601+2025=X^2
X^2=4626
X=SQRT626
X=68.0147 ANSWER.
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IF THE 51 FT IS THE HYPOTENUSE OF THE RIGHT TRIANGLE THEN:
45^2+X^2=51^2
2025+X^2=2601
X^2=2601-2025
X^2=576
X=SQRT576
X=24 FT FOR THE OTHER SIDE.
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Coordinate-system/85303: in the formula f=9/5c+32 what is the farenheiht if the celsius is -10,0,15,100?
1 solutions
Answer 61505 by checkley75(3666) on 2007-06-13 18:21:22 (Show Source):
You can put this solution on YOUR website!F=9/5C+32
F=9/5*-10+32
F=-90/5+32
F=-18+32
F=14 ANSWER FOR C=-10
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F=9/5C+32
F=9/5*0+32
F=32 FOR C=0
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F=9/5*C+32
F=9/5*15+32
F=135/5+32
F=27+32
F=59 FOR C=15
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F=9/5C=32
F=9/5*100+32
F=900/5+32
F=180+32
F=212 FOR C=100
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Exponents/85315: Hello out there,I'm having some trouble with some problems that I need help with,the first one is,A rectangle has side length 30 mm and diagonal length 34 mm.Find the length of the other side of the rectangle to the nearest whole number.Second one is,Estimate the value of the square root:0.85.Next one is,If x=0.04,what is the value of x?The last one is,Express 0.0049 in scientific notation.Thanks for whoever can help.
1 solutions
Answer 61503 by checkley75(3666) on 2007-06-13 18:15:19 (Show Source):
You can put this solution on YOUR website!30^2+X^2=34^6 THIS IS A RIGHT TRIANGLE WITH THE FORMULA FOR THE SIDES OF
A^2+B^2=C^2
30^2+X^2=34^2
900+X^2=1190
X^2=1190-900
X^2=290
X=SQRT290
X=17.03 FOR THE OTHER SIDE.
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SQRT.85~.92
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X=.04 OR X=4/100 OR X=4% OR X=1/25
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.0049=4.9*10^-3 BECAUSE WE HAVE MOVED THE DECIMAL 3 PLACES TO THE RIGHT OR WE'VE MULTIPLIED THE NUMBER BY 1,000
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Miscellaneous_Word_Problems/85313: hey,
I'm really stuck on this problem: Jason can lift a small car with the use of a lever. The short end of the steel rod is 8 inches from the fulcrum and the long end is 8 feet from the fulcrum. What is the maximum weight Jason can lift if he weighs 160 pounds.
thanks
1 solutions
Answer 61496 by checkley75(3666) on 2007-06-13 17:35:11 (Show Source):
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Money_Word_Problems/85250: Helllo,
I need help with this word problem:
Mrs. Lambert invested a portion of $15,000 at 10% annual interest and the balance at 6% annual interest. If her investments earned $1260 for the year, how much did she invest in each account?
Thank you!!
1 solutions
Answer 61494 by checkley75(3666) on 2007-06-13 17:19:49 (Show Source):
You can put this solution on YOUR website!.10X+.06(15000-X)=1260
.10X+900-.06X=1260
.04X=1260-900
.04X=360
X=360/.04
X=9000 INVESTED @ 10%.
15000-9000=6000 INVESTED @ 6%.
PROOF
.10*9000+.06*6000=1260
900+360=1260
1260=1260
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Complex_Numbers/85258: can i get to know the meaning and definition of algebra.please dont give a very complicated one which i wont be able to understand.i m 8th standard.
1 solutions
Answer 61490 by checkley75(3666) on 2007-06-13 17:06:47 (Show Source):
You can put this solution on YOUR website!ALGEBRA IS SOMETHING YOU HAVE DONE ALMOST DAILY:
EXAMPLE:
YOU GET A $20.00 BILL TO PAY FOR A $16.55 PURCHASE.
THE ALGEBRA EXPRESSION FOR THIS PROBLEM IS 20,00-16.55=X X BEING THE AMOUNT OF THE CHANGE.
20.00-16.55=X
$3.45=X OR THE AMOUNT OF CHANGE TO BE RETURNED.
EXAMPLE:
A DOZEN EGGS COST $2.40. HOW MUCH IS THE COST FOR EACH EGG? SEEING AS THERE ARE 12 EGGS IN A DOZEN WE SET UP AN EQUATION THUS:
12E=2.40 NOW TO GET THE PRICE OF 1 EGG WE HAVE TO DIVIDE 12E BY 12 TO GET 1E'
AND WE ALSO HAVE TO DIVIDE 2.40 BY 12. WHAT WE DO TO THE LEFT SIDE OF AN EQUATION WE MUST DO THE SAME TO THE RIGHT SIDE OF THE EQUATION.
12E/12=2.40/12
E=.20 OR 1 EGG COSTS $.20 OR 20 CENTS.
PROOF
12*.20=2.40
2.40=2.40
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HOPE THIS EXPLAINS THAT ALGEBRA IS NOT A COMPLEX PROCESS.
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Exponents/85260: Tutor: Can you help me please..... the problem is to simplify, using positive exponents (z^5 x^5)-3
Thank you for your help!
1 solutions
Answer 61488 by checkley75(3666) on 2007-06-13 16:57:49 (Show Source):
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Money_Word_Problems/85264: Kindly Solve this Problem Please.
Sorry There was no ISBN in this Book....
1. A person invested $ 15,000. The greater part is invested at 8% and smaller part at 6%. The annual income in the greater part is $ 200 more than the annual income of the smaller part. What is hte smaller part of the investment?
1 solutions
Answer 61487 by checkley75(3666) on 2007-06-13 16:54:24 (Show Source):
You can put this solution on YOUR website!.08*X=.06(15000-X)+200
.08X=900-.06X+200
.08X+.06X=1100
.14X=1100
X=1100/.14
X=7857.14 INVESTED @ 8%.
15000-7857.14=7142.86 INVESTED @ 6%.
PROOF
.08*7857.14=.06*7142.86+200
628.57=428.57+200
628.57=628.57
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Mixture_Word_Problems/85295: Problem:
The length of a rectangular poool is 40 feet. the width is 24 feet. A walkway of uniform width surrounds the pool. The combined area of the pool and walkway is 2240 sqft. Find the width of the walkway?
Solution:
40s+40s+24s+24s = 2240
128s = 2240
s = 17.5
I dont know how to go about it... I know this is wrong!!!!
Plz help!!!! I do not have the ISBN because that is from one of my exams .
1 solutions
Answer 61486 by checkley75(3666) on 2007-06-13 16:45:29 (Show Source):
You can put this solution on YOUR website!40*24=960 SQUARE FEET FOR THE POOL.
(40+2X)(24+2X)=2240 THESE ARE THE NEW DIMENTIONS WHEN YOU ADD THE WALKWAY WITH A WIDTH OF X. tHE BEST WAY TO VISUALIZE THIS IS TO DRAW A DIAGRAM OF THE POOL AND ADD THE WALKWAY OF WIDTH X.
960+48X+80X+4X^2=2240
4X^2+128X+960-2240=0
4X^2+128X-1280=0
4(X^2+32X-320)=0
4(X-8)(X+40)=0
X-8=0
X=8 FEET ANSWER FOR THE WIDTH OF THE WALKWAY.
PROOF
(40+2*8)(24+2*8)=2240
(40+16)(24+16)=2240
56*40=2240
2240=2240
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Miscellaneous_Word_Problems/85301: the school car wash charged $5 for a car and $6 for a van a total of 86 cars and vans were washed they earned $475 by solving a linear system how much of each were washed?
1 solutions
Answer 61485 by checkley75(3666) on 2007-06-13 16:32:31 (Show Source):
You can put this solution on YOUR website!C+V=86 C=86-V
5C+6V=475 NOW SUBSTITUTE (86-V) FOR C AND SOLVE FOR V.
5(86-V)+6V=475
430-5V+6V=475
V=475-430
V=45 VANS WASHED.
C+45=86
C=86-45
C=41 CARS WASHED.
PROOF
5*41+6*45=475
205+270=475
475=475
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Rectangles/85276: A rectangular label on a book has an area of 44^cm2 and a perimeter of 27cm.Find the dimensions of the label.If somebody could help me with thes thank you a lot.
1 solutions
Answer 61464 by checkley75(3666) on 2007-06-13 11:17:09 (Show Source):
You can put this solution on YOUR website!27=2L+2W & L*W=44 L=44/W NOW SUBSTITUTE (44/W) FOR L IN THE FIRST EQUATION & SOLVE FOR W.
27=2(44/W)+2W
27=88/W+2W
27=(88+2W^2)/W
27W=88+2W^2
2W^2-27W+88=0
(2W-11)(W-8)=0
2W-11=0
2W=11
W=11/2
W=5.5 ANSWER.
W-8=0
W=8 ANSWER.
27=2L+2*5.5
27=2L-11
2L=27-11
2L=16
L=8 ANSWER WHEN W=5.5
L=5.5 WHEN W=8.
PROOF
44=8*5.5
44=44
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