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# Recent problems solved by 'checkley75'

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 Exponents-negative-and-fractional/85472: This question is from textbook algebra Find the perimeter of the given figure, not sure what to do. rectangle shape with the equation to solve. x/2x-5 and 8/2x-5 please help1 solutions Answer 61713 by checkley75(3666)   on 2007-06-15 20:54:52 (Show Source): You can put this solution on YOUR website!IF X/(2X-5) & 8/(X-5) ARE THE 2 DIMENTIONS OF THE RECTANGLE THEN THE PERIMETER IS: 2*X/(X-5)+2*8/(X-5) 2X/(X-5)+16(X-5) (2X-16)/(X-5) 2(X-8)/(X-5) IS THE PERIMETER OF THE RECTANGLE.
 Equations/85473: can you help me please? does -3+ 1 -10 1 = 7 thanks for your help.1 solutions Answer 61712 by checkley75(3666)   on 2007-06-15 20:49:44 (Show Source): You can put this solution on YOUR website!YOU HAVE AN SPACE BETWEEN THE 10 & THE 1 WITH NO +,-,/,* OR ^ SIGN. IS THERE A SIGN MISSING????
 Quadratic_Equations/85481: Write in simplest form 3x^5/15x^121 solutions Answer 61711 by checkley75(3666)   on 2007-06-15 20:45:55 (Show Source): You can put this solution on YOUR website!3X^5/15X^12=1/5X^7
 Percentage-and-ratio-word-problems/85394: Adam tried to compute the average of his 7 test scores. He mistakenly divided the correct sum of all of his test scores by 6, which yielded 84. What is Adam's correct average test score?1 solutions Answer 61553 by checkley75(3666)   on 2007-06-14 10:37:10 (Show Source): You can put this solution on YOUR website!X/6=84 X=6*84 X=504 TOTAL OF ALL TESTS. 504/7=72 IS THE REAL AVERAGE OF THE 7 TESTS.
 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 ------------- -Y=-2 Y=2 ANSWER. -------------------------------------- 8X-4Y=16 NOW MULTIPLY THE SECOND EQUATION BY 4 & ADD. -8X+4Y=-16 -------------- 0X+0Y=0 NO SOLUTION AS THESE ARE THE SAME EQUATION WITH 2 UNKNOWNS. -------------------------------------- I'LL LEAVE THE REST FOR YOU TO MASTER.
 Geometry_Word_Problems/85368: 56) Geometry. A triangle has sides 3x + 7, 4x – 9, and 5x + 6. Find the expression that represents its perimeter.1 solutions Answer 61551 by checkley75(3666)   on 2007-06-14 10:27:33 (Show Source): You can put this solution on YOUR website!3X+7+4X-9+5X+6=12X+4=4(3X+1) IS THE PERIMETER.
 Rectangles/85386: How do you find the demensions of a rectangle? 1 solutions Answer 61550 by checkley75(3666)   on 2007-06-14 10:22:58 (Show Source): You can put this solution on YOUR website!PERIMETER OF A RECTANGLE = 2*LENGTH+2*WIDTH AREA OF A RECTANGLE = LENGTH*WIDTH.
 Expressions-with-variables/85346: Multiplying and dividing real numbers -5^2 - 31 solutions Answer 61535 by checkley75(3666)   on 2007-06-13 21:19:27 (Show Source): You can put this solution on YOUR website!-5^2-3 25-3=22 ANSWER.
 Expressions-with-variables/85345: Evaluate each of the expressions if a = -2, b = 5, c = -4, and d = 6 b2 – 2bc + c21 solutions Answer 61534 by checkley75(3666)   on 2007-06-13 21:18:25 (Show Source): You can put this solution on YOUR website!B^2-2BC+C^2 5^2-(2*5*-4)+(-4)^2 25+40+16=81 ANSWER.
 Equations/85329: lyn has twice as much moneyas jo. together they have \$ 63. how much does each one have?1 solutions Answer 61526 by checkley75(3666)   on 2007-06-13 21:01:20 (Show Source): You can put this solution on YOUR website!X+2X=63 3X=63 X=63/3 X=21 JO'S MONEY 2*21=42 LYN'S MONEY PROOF 21+42=63 63=63
 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): You can put this solution on YOUR website!Y=X+12 X+2Y=39 X+2(X+12)=39 X+2X+24=39 3X=39-24 3X=15 X=15/3 X=5 ANSWER. Y=5+12 Y=17 ANSWER.
 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): You can put this solution on YOUR website!5X-2Y=10 5*0-2*-5=10 0+10=10 10=10 (0,-5) IS A SOLUTION.
 real-numbers/85342: Use the distributive property to remove the parentheses in each expression 7(4w - 3) – 25w1 solutions Answer 61523 by checkley75(3666)   on 2007-06-13 20:46:02 (Show Source): You can put this solution on YOUR website!7(4W-3)-25W 28W-21-25W 3W-21 3(W-7)
 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. ------------------------------------- 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.
 decimal-numbers/81373: How to change 0.635 to a percent and rounded to the nearest tenth where necessary?1 solutions Answer 61509 by checkley75(3666)   on 2007-06-13 18:33:51 (Show Source): You can put this solution on YOUR website!.635=63.5% ALREADY ROUNDED TO THE NEAREST TENTH.
 Radicals/85297: Help! What is sqrt. of 63 – 2sqrt. of 28 + 5sqrt. of 7 ? Thanks!! 1 solutions Answer 61508 by checkley75(3666)   on 2007-06-13 18:28:36 (Show Source): You can put this solution on YOUR website!SQRT63-2SQRT28+5SQRT7 SQRT9*7-2SQRT4*7+5SQRT7 3SQRT7-4SQRT7+5SQRT7 4SQRT7 ANSWER.
 Miscellaneous_Word_Problems/85302: write let statements and express the following as an equation "the diffrences between three times the smaller number and one half the larger nummber is 5"1 solutions Answer 61506 by checkley75(3666)   on 2007-06-13 18:25:50 (Show Source): You can put this solution on YOUR website!3X-Y/2=5 X BEING THE SMALLER NUMBER & Y BEING THE LARGER NUMBER.
 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 ------------------------------------- F=9/5C+32 F=9/5*0+32 F=32 FOR C=0 ------------------------------------ F=9/5*C+32 F=9/5*15+32 F=135/5+32 F=27+32 F=59 FOR C=15 ------------------------------------------ F=9/5C=32 F=9/5*100+32 F=900/5+32 F=180+32 F=212 FOR C=100
 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. ---------------------------------------------------------- SQRT.85~.92 --------------------------------------------------------- X=.04 OR X=4/100 OR X=4% OR X=1/25 ---------------------------------------------------------- .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
 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. thanks1 solutions Answer 61496 by checkley75(3666)   on 2007-06-13 17:35:11 (Show Source): You can put this solution on YOUR website!8X=8*12*160 8X=15,360 X=15,360/8 X=1920 LBS. IS THE MAX. WEIGHT HE CAN LIFT.
 Rational-functions/85311: This question is from textbook ALgebra and Trigonometry (x-y)^-1 - (x+y)^-11 solutions Answer 61495 by checkley75(3666)   on 2007-06-13 17:31:45 (Show Source): You can put this solution on YOUR website!(X-Y)^-1-(X+Y)^-1 1/(X-Y)-1/(X+Y) [(X+Y)-(X-Y)]/(X-Y)(X+Y) 2Y/(X-Y)(X+Y)
 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
 Linear_Equations_And_Systems_Word_Problems/85305: Hello, I need help with this problem: If 500 sheets of paper weigh 7 lbs, how much do 2 sheets weigh? Thanks 1 solutions Answer 61493 by checkley75(3666)   on 2007-06-13 17:14:11 (Show Source): You can put this solution on YOUR website!7/500=X/2 500X=14 X=14/500 X=.028 LBS FOR THE 2 SHEETS.
 Linear_Equations_And_Systems_Word_Problems/85304: Hello, I need help finding three consecutive integers such that the sum of the first and third is 84. Thanks1 solutions Answer 61492 by checkley75(3666)   on 2007-06-13 17:10:56 (Show Source): You can put this solution on YOUR website!LET X BE THE FIRST NUMBER & (X+2) THE THIRD CONSECUTIVE NUMBER. X+(X+2)=84 2X+2=84 2X=84-2 2X=82 X=82/2 X=41 THE FIRST NUMBER THUS THE THIRD NUMBER IS 41+2=43 PROOF 41+43=84 84=84
 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 --------------------------------------------------------- HOPE THIS EXPLAINS THAT ALGEBRA IS NOT A COMPLEX PROCESS.
 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): You can put this solution on YOUR website!(Z^5X^5)^-3 Z^-15Z^-15 1/X^15Z^15
 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
 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
 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
 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