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Recent problems solved by 'checkley71'

checkley71 answered: 8399 problems
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Angles/116925: The three angles in trangle POR are in the ratio of 6:26:13. What is the measure of each angle? 1 solutions Answer 85045 by checkley71(8403)   on 2007-12-15 11:44:33 (Show Source): You can put this solution on YOUR website! IF YOU ADD 16+26+13=55 NOW DIVIDE 180 BY 55 180/55=3.27272727 THIS IS THE FACTOR TO MULTIPLY EACH RATIO BY TO FIND THE SPECIFIC ANGLES. 16*3.272727=52.363636 DEGREES FOR ANGLE #1 26*3.272727=85.090909 DEGREES FOR ANGLE #2 13*3.272727=42.545454 DEGREES FOR ANGLE #3 NOW ADD THEM. 52.363636 85.090909 42.545454 ----------------- 179.999999 OR ROUNDED TO 180 DEGREES.

Problems-with-consecutive-odd-even-integers/116967: 3t-2(t+3)=t 1 solutions Answer 85043 by checkley71(8403)   on 2007-12-15 11:37:08 (Show Source): You can put this solution on YOUR website! 3T-2(T+3)=T 3T-2T-6=T 3T-2T-T=6 3T-3T=6 0T=6 NO SOLUTION HERE FOR T.

Polynomials-and-rational-expressions/116926: Simplify the Rational expression. x^2+8x+12 /x^2+10x+16 1 solutions Answer 85041 by checkley71(8403)   on 2007-12-15 11:34:34 (Show Source): You can put this solution on YOUR website! IF (X^2+8X+12)/(X^2+10X+16) IS THE PROBLEM. THEN: (X+6)(X+2)/(X+8)(X+2) CANCEL OUT THE 9X+2) TERMS. (X+6)/(X+8) IS THE ANSWER.

Polynomials-and-rational-expressions/116928: (2p^3v^4/s^3)^3 1 solutions Answer 85040 by checkley71(8403)   on 2007-12-15 11:31:24 (Show Source): You can put this solution on YOUR website! (2P^3V^4/S^3)^3 (2P^9V^12/S^9) ANSWER.

Polynomials-and-rational-expressions/116931: Simplify the expression. Write the reslut using positive exponets only. (xy^4)^-2 ________ x^5y 1 solutions Answer 85039 by checkley71(8403)   on 2007-12-15 11:28:53 (Show Source): You can put this solution on YOUR website! (XY^4)^-2/X^5Y 1/(X^2Y^8)(X^5Y) 1/X^7Y^9

Systems-of-equations/116936: solve the equation -0.02y + 0.08(10,000-y)=0.15y 1 solutions Answer 85038 by checkley71(8403)   on 2007-12-15 11:24:03 (Show Source): You can put this solution on YOUR website! -0.02Y+0.08(10,000-Y)=0.15Y -0.02Y+800-0.08Y=0.15Y -0.02Y-0.08Y-0.15Y=-800 -0.25Y=-800 Y=-800/-0.25 Y=3,200 ANSWER.

Linear-systems/116940: 1,000 (3,500) + 200 (0) + 1,900 (85% P) + 100 (P) = 11,100,000 1 solutions Answer 85037 by checkley71(8403)   on 2007-12-15 11:19:44 (Show Source): You can put this solution on YOUR website! 1,000*3,500+200*0+1,900*.85P+100P=11,100,000 3,500,000+0+1,615P+100P=11,100,000 1,715P=11,100,000-3,500,000 1,715P=7,600,000 P=7,600,000/1,715 P=4,431.4868 ANSWER.

Rectangles/116942: find the length of a rectangle with 36cm as its diagonal 1 solutions Answer 85036 by checkley71(8403)   on 2007-12-15 11:12:52 (Show Source): You can put this solution on YOUR website! THERE ARE MANY ANSWERS TO THIS QUESTION. X^2+Y^2=36 IF X IS THE LENGTH OF 4 THEN: 16+Y^2=36 Y^2=36-16 Y^2=36-16 Y^2=20 Y=SQRT20 Y=4.47 FOR THE WIDTH PROOF 4*2+4.4762=36 16+20=36 36=36 ALSO IF X IS THE LENGTH OF 5 THEN: 5^2+Y^2=36 25+Y^2=36 Y^2=36-25 Y^2=9 Y=SQRT9 Y=3 FOR THE WIDTH. PROOF 5^2+3^2=36 25+9=36 36=36

Geometric_formulas/116952: Please Help Subtract -2.3 - (-8.8) 1 solutions Answer 85035 by checkley71(8403)   on 2007-12-15 11:05:13 (Show Source): You can put this solution on YOUR website! -2.3-(-8.8) -2.3+8.8 6.5 ANSWER.

Geometric_formulas/116951: Could someone please help me with this Add -3/5 + [8/35] 1 solutions Answer 85034 by checkley71(8403)   on 2007-12-15 11:03:49 (Show Source): You can put this solution on YOUR website! -3/5+8/35 -3*7/35+8/35 -21/35+8/35 -13/35 ANSWER.

Geometric_formulas/116953: Help..LOL Multiply (1.3)(10)(-4) 1 solutions Answer 85032 by checkley71(8403)   on 2007-12-15 11:01:16 (Show Source): You can put this solution on YOUR website! 1.3*10*-4=13*-4=-52 ANSWER

Geometric_formulas/116955: please help Find the reciprocal of 1/3(9-4) 1 solutions Answer 85031 by checkley71(8403)   on 2007-12-15 10:59:42 (Show Source): You can put this solution on YOUR website! 1/3(9-4) 1/3*5 5/3 HAS 3/5 AS IT'S RECIPRICAL.

Geometric_formulas/116954: Please Help Divide 90/18 1 solutions Answer 85030 by checkley71(8403)   on 2007-12-15 10:57:51 (Show Source): You can put this solution on YOUR website! 90/18 (18*5)/18 NOW CANCEL OUT THE 18s 5 IS THE ANSWER. OR DIVIDE 90 BY 18 (LONG DIVISION) & YOU STILL GET 5 AS AN ANSWER.

Geometric_formulas/116956: Can someone please help me with this. Subtract 7/9 - [-13/18] 1 solutions Answer 85029 by checkley71(8403)   on 2007-12-15 10:55:34 (Show Source): You can put this solution on YOUR website! 7/9-(-13/18) 7/9+13/18 14/18+13/18 27/18 3/2 OR 1.5 ANSWER.

Geometric_formulas/116957: please help me with this Find the reciprocal of [-1/5](15) 1 solutions Answer 85028 by checkley71(8403)   on 2007-12-15 10:53:28 (Show Source): You can put this solution on YOUR website! -1/5*15=-15/5=-3 THE RECIPRICAL OF -3 IS -1/3

Geometric_formulas/116958: Place the following set of numbers in ascending order -2/9, 5/9, 1/8, -1/9, 3/7 thanks for your help 1 solutions Answer 85027 by checkley71(8403)   on 2007-12-15 10:51:22 (Show Source): You can put this solution on YOUR website! -2/9,-1/9,1/8,3/7,5/9 OR: -0.222222,-0.111111,0.125,0.42857,0.55555

Human-and-algebraic-language/116962: 3x-6y=9 4x-2y=24 1 solutions Answer 85026 by checkley71(8403)   on 2007-12-15 10:47:28 (Show Source): You can put this solution on YOUR website! I WILL ASSUME YOUWANT TO SOLVE THIS SET OF EQUATION BY GRAPHING!!!!!! 3X-6Y=9 OR -6Y=-3X+9 OR Y=-3X/-6+9/-6 OR Y=X/2-3/2 (RED LINE) 4X-2Y=24 OR -2Y=-4X+24 OR Y=-4X/-2+24/-2 OR Y=2X-12 (GREEN LINE) (graph 300x200 pixels, x from -6 to 15, y from -20 to 10, of TWO functions y = x/2 -3/2 and y = 2x -12). IT WOULD SEEM THAT THE SOLUTION IS (7,2)

Volume/116909: Leslie has 200 cm cubes. What is the volume of the largest cube she can make with them? How many different cubes can she make with the centimetres cubes she have left over? 1 solutions Answer 84996 by checkley71(8403)   on 2007-12-14 22:27:59 (Show Source): You can put this solution on YOUR website! CUBE ROOT OF 200=5.848 THEREFORE ONLY A 5*5*5=125 CUBE CAN BE MADE WITH 200 CUBES. CUBE ROOT OF THE REMAINING 75=4.2172 THEREFORE ONLY A 4*4*4=64 CUBE CAN BE MADE WITH 75 CUBES. CUBE ROOT OF THE REMAINING 11=2.224 THEREFORE ONLY A 2*2*2=8 CUBE CAN BE MADE WITH 11 CUBES. CUBE ROOT OF THE REMAINING 3 CUBES=0 PROOF 5^3+4^3+2^3+3=200 125+64+8+3=200 200=200

Volume/116911: A olympic swimming pool is 50m long, 21m wide and 1.8m deep. Calculate the amount of water it can hold? 1 solutions Answer 84994 by checkley71(8403)   on 2007-12-14 22:15:40 (Show Source): You can put this solution on YOUR website! 50*21*1.8=1,890 CUBIC METERS OF WATER.

Polynomials-and-rational-expressions/116912: Can you tell me if my answer is right or not if not can you tell me what i did wrong. Factor completely x^3 - 26x^2 + 48x x(x^2 - 26x + 48) = x(x^2 - 2x) (x - 24) 1 solutions Answer 84993 by checkley71(8403)   on 2007-12-14 22:13:23 (Show Source): You can put this solution on YOUR website! X^3-26X^2+48X X(X^2-26X+48) X(X-2)(X-24) YOU HAVE (X^2-2X) WHICH IS INCORRECT. IF YOU MULTIPLY YOUR FACTORS: X^2-2X X-24 ----------------------------------- X^3-2X^2-24X^2+48X X^3-26X^2+48X HOWEVER YOU HAVE ALREADY FACTORED OUT THE X TERM FROM ALL ELEMENTS WHICH IF YOU MULTIPLIES THIS TERM BY X YOU WOULD GET X^4-26X^3+48X^2 WHICH IS NOT WHAT YOU STARTED WITH. ------------------------------------------ MULTIPLY MY FACTORS X-2 X-24 ------------- X^2-2X-24X+48 (X^2-26X+48) WHICH IS WHAT YOU FACTORED AFTER YOU EXTRACTED THE COMMON X TERM.

Polynomials-and-rational-expressions/116914: can you help me with this i do not understand it. can you show me step by step. factor completely x^2 - 5x - 14 1 solutions Answer 84991 by checkley71(8403)   on 2007-12-14 22:04:16 (Show Source): You can put this solution on YOUR website! X^2-5X-14 YOU NEED TO FIND TWO FACTORS OF -14 THAT WHEN ADDED WILL EQUAL -5. THE FACTORS OF -14 ARE 1*-14, -1*14, 2*-7 & -2*7 THE FIRST SET ADDS UP TO 1-14=-13 THE SECOND SET ADDS UP TO -1+14=13 THE NEXT SET ADDS UP TO 2-7=-5 THIS LOOKS LIKE A SOLUTION SO WE USE THEM: (X+2)(X-7) ANSWER. PROOF X+2 X-7 NOW MULTIPLY --------------------- X^2+2X-7X-14 X^2-5X-14 LOOKS LIKE A WINNER TO ME.

Equations/116915: 5/9y-4=6 1 solutions Answer 84989 by checkley71(8403)   on 2007-12-14 21:57:36 (Show Source): You can put this solution on YOUR website! IF YOU MEAN: (5/9)Y-4=6 5Y/9=6+4 5Y/9=10 NOW CROSS MULTIPLY 5Y=90 Y=90/5 Y=18 ANSWER. ------------------------------------------ HOWEVER IF YOU MEAN: 5/(9Y)-4=6 5/(9Y)=6+4 5/(9Y)=10 NOW CROSS MULTIPLY 5=90Y Y=5/90 Y=1/18 ANSWER. ------------------------------------------------- HOWEVER IF YOU MEAN: 5/(9Y-4)=6 CROSS MULTIPLY 5=6(9Y-4) 5=54Y-24 54Y=5+24 54Y=29 Y=29/54 ANSWER. -------------------------------------------------- SUGGEST YOU MAKE MORE USE OF ( ) WHEN SUBMITTING THESE TYPE OF PROBLEMS.

Polynomials-and-rational-expressions/116916: can you please help me with this problem. I do not understand how to do this. Factor Completely 4x^2 + 36y^2 1 solutions Answer 84987 by checkley71(8403)   on 2007-12-14 21:49:50 (Show Source): You can put this solution on YOUR website! 4X^2+36Y^2 4(X^2+9Y^2) 4(X+3Yi)(X-3Yi) IF YOU WANT TO GET INTO IMAGIMARY ROOTS(i). PROOF: X+3Yi X-3Yi -------------------- X^2+3XYi-3XYi-9Y^2i^2 X^2-9Y^2i^2 (NOTE THAT i=SQRT-1) SO i^2=SQRT-1*SQRT-1=-1 X^2-9Y^2*-1=X^2+9Y^2

Miscellaneous_Word_Problems/116837: This question is from textbook simplify: (ax-4x) + (18ax -5x) 1 solutions Answer 84986 by checkley71(8403)   on 2007-12-14 21:47:12 (Show Source): You can put this solution on YOUR website! AX-4X 18AX-5X ----------------- 19AX-9X X(19A-9)

Polynomials-and-rational-expressions/116839: Please help me with the following three questions they are very confusing and i don't understand it. PLEASE HELP ME!!!!! 1) x-7 -4 ____ __ 3 3 2) x^2+3x-18 _________ 2x-6 3) 2x^2-4x-6 _________ x-3 1 solutions Answer 84985 by checkley71(8403)   on 2007-12-14 21:43:52 (Show Source): You can put this solution on YOUR website! (X-7)/3-4/3 (X-7-4)/3 (X-11)/3 ANSWER. ------------------------------------------------------------------- (X^2+3X-18)/(2X-6) (X+6)(X-3)/2(X-3) NOW CANCEL OUT THE (X-3) TERMS. (X+6)/2 ANSWER. -------------------------------------------------------------------- (2X^2-4X-6)/(X-3) (2X+2)(X-3)/(X-3) AGAIN CANCEL OUT THE (X-3) TERM. 2X+2 2(X+1) ANSWER.

Polynomials-and-rational-expressions/116843: Remove the parenthesis and simplify when possible. 8d-(-7c-2d) 1 solutions Answer 84984 by checkley71(8403)   on 2007-12-14 21:32:25 (Show Source): You can put this solution on YOUR website! 8D-(-7C-2D) 8D+7C+2D 10D+7C ANSWER.

Linear-equations/116845: 2[4 – 2(3 – x)] – 1 = 4[2(4x – 3) + 7] – 25 can you help me solve this and show me how to work it out ? I understand that there are different ways. Can someone please show me some ? Thanks 1 solutions Answer 84983 by checkley71(8403)   on 2007-12-14 21:30:26 (Show Source): You can put this solution on YOUR website! THERE IS ONLY 1 WAY TO SOLVE THESE TYPE OF PROBLEMS. WORK FROM WITHIN THE ( ) FIRST, THEN MULTIPLY/DIVIDE THEN ADD/SUBTRACT. 2[4-2(3-X)-1=4[2(4X-3)+7]-25 2[4-6+2X]-1=4[8X-6+7]-25 8-12+4X-1=32X-24+28-25 4X-32X=-24+28-25-8+12 -28X=-17 X=-17/-28 X=17/28 ANSWER.

Travel_Word_Problems/116846: A bicyclist traveled to a nearby town at the rate of 24 mph and returned at the rate of 18 mph. It took him 4.9 hours. What was the distance to the town? I know d = r * t but just can't get the formula to work. 1 solutions Answer 84982 by checkley71(8403)   on 2007-12-14 21:22:41 (Show Source): You can put this solution on YOUR website! 24T=18(4.9-T) 24T=88.2-18T 24T+18T=88.2 42T=88.2 T=88.2/42 T=2.1 HOURS FOR THE 24 MPH TRIP. 4.9-2.1=2.8 HOURS FOR THE 18 MPH TRIP. PROOF 24*2.1=18*2.8 50.4=50.4 MILES WHICH IS THE DISTANCE TO THE TOWN VISITED..

Geometry_Word_Problems/116850: The length of a rectangle is 10 in. more than twice its width. If the perimeter of the rectangle is 32 in., find the width of the rectangle. Thanks so much! 1 solutions Answer 84981 by checkley71(8403)   on 2007-12-14 21:13:06 (Show Source): You can put this solution on YOUR website! L=2W+10 32=2(2W+10)+2W 32=4W+20+2W 32=6W+20 6W=32-20 6W=12 W=12/6 W=2 ANSWER FOR THE WIDTH. L=2*2+10 L=4+10 L=14 ANSWER FOR THE LENGTH. PROOF 2*2+2*14=32 4+28=32 32=32

Coordinate-system/116862: Determine wether the lines through the pairs of points are parallel,perpendiular, or neither. 12x+4y = 16 27x+9y = 40 1 solutions Answer 84980 by checkley71(8403)   on 2007-12-14 21:09:18 (Show Source): You can put this solution on YOUR website! 12X+4Y=16 OR 4Y=-12X+16 OR Y=-12X/4+16/4 OR Y=-3X+4 27X+9Y=40 OR 9Y=-27X+40 OR Y=-27X/9+40/9 OR Y=-3X+40/9 THESE 2 EQUATIONS HAVE THE SAME SLOPE (-3) THEREFORE THEY ARE PARALLEL LINES.

Human-and-algebraic-language/116871: A mason is building a drystack stone wall that is 3 feet high. If each stone is 4 inches high, how many rows of stone will the wall contain? 1 solutions Answer 84979 by checkley71(8403)   on 2007-12-14 21:05:33 (Show Source): You can put this solution on YOUR website! 3 FEET=36 INCHES 36/4=9 ROWS OF 4 IN BRICKS WILL BE USED.