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Recent problems solved by 'checkley71'

checkley71 answered: 8399 problems
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Radicals/37095: Please please help me. I tried on my own but I don't know if I did it right and i don't want to look stupid. My professor has already been more than patient with me. solve the following equations: #1 A. square root x-2=1 (show work) ****heres what I have***** (sqrt x-2)^2=(1)^2 x-2=1 x=3 B. sqrtx^3=27 show work ********heres what I have****** (sqrtx^3)^2=(27)^2 x^3=729 C. 3sqrtx^2=9 I really tried here but couldn't figure it out. I appreciate your time. 1 solutions Answer 22812 by checkley71(8403)   on 2006-05-10 10:40:27 (Show Source): You can put this solution on YOUR website! SQRT(X-2)=1 OR SQUARING BOTH SIDES WE GET X-2=1 OR X=3 PROOF SQRT3-2=1 OR SQRT1=1 1=1 SQRT(X~3)=27 OR SQUARING BOTH SIDES WE GET X~3=27*27 OR X~3=3*3*3*3*3*3 OR X*X*X=9*9*9 THUS X=9

Linear-equations/37088: Write the equation of a line parallel to the x-axis and passing through (-8,6) i just know y=mx+b.. and i dont know where to go from there. thanks 1 solutions Answer 22811 by checkley71(8403)   on 2006-05-10 10:27:46 (Show Source): You can put this solution on YOUR website! (-8,6) A PARALLEL LINE TO THE X AXIS HAS THE SAME X VALUE (-8) WHILE THE Y VALUE CAN HAVE ANY VALUE. Y=mX+b Y=0X+6

Linear-equations/37096: Determine the points of intersection using algebra.Check using graphing and substituition......a..3x=y-1=0,2x=y-6 1 solutions Answer 22810 by checkley71(8403)   on 2006-05-10 10:07:23 (Show Source): You can put this solution on YOUR website! 3X=Y-1 2X=Y-6 SUBTRACTING THE TWO EQUATIONS WE GET ------------ X=5 & 3*5=Y-1 OR 15=Y-1 OR Y=16 PROOF 2*5=16-6 OR 10=10

Equations/37122: 0.4x-1.6=o.x 1 solutions Answer 22808 by checkley71(8403)   on 2006-05-10 10:01:44 (Show Source): You can put this solution on YOUR website! 0.4X-1.6=0X OR .4X=1.6 OR X=1.6/.4 OR X=4

Angles/37129: This question is from textbook Steck-Vaughn GED math A Wall in Andrea'S living rooom is 12 feet long.She buys four bookcases to fit along this.If each bookcase is 35 inchews wide,which of the following is true?A}They will be 8 inches too wide B}They will be 4 inches too wide C}They will fit exactly D}They will fit with 4 inches left over F}They will fit with 8 Inches left over 1 solutions Answer 22807 by checkley71(8403)   on 2006-05-10 09:59:38 (Show Source): You can put this solution on YOUR website! 12 FEET IS = TO 144 INCHES THUS 4&35 INCHES = 140 INCHES SO 144-140=4 INCHES LEFT OVER AFTER THE BOOKCASES ARE PLACED. ANSWERIS D)

Points-lines-and-rays/37057: Find the coordinates of the midpoint of a segment with each pair of endpoints. K(1/4, 1), L(1/8, 0) 1 solutions Answer 22775 by checkley71(8403)   on 2006-05-09 21:08:13 (Show Source): You can put this solution on YOUR website! MIDPOINTS ARE FOR X (1/4+1/8)/2 OR ((2+1)/8)/2=(3/8)/2=3/16 THUS X MIDPOINT IS 3/16 & THE Y MID POINT IS 0+1/2 OR 1/2 THUS THE MIDPOINT IS (3/16,1/2)

Linear-systems/37063: This question is from textbook Solve by substitution - 4x - 12y = 5 -x + 3y = -1 1 solutions Answer 22771 by checkley71(8403)   on 2006-05-09 20:59:30 (Show Source): You can put this solution on YOUR website! -X+3Y=-1 OR X=3Y+1 SUB 3Y+1 FOR X IN EQUATION #1 WE GET 4(3Y+1)-12Y=5 OR 12Y+4-12Y=5 OR 4=5 (NO SOLUTION) IF YOU PLOT THESE TWO LINES YOU'LL FIND THAT THEY ARE PARALLEL)

Linear-equations/37059: Write an equation of the line that passes through the given point and has the givent slope. Use the equation to find two other points on the line. Check your solutions. (-2,2); m = 3 1 solutions Answer 22769 by checkley71(8403)   on 2006-05-09 20:53:47 (Show Source): You can put this solution on YOUR website! Y=3X+8 (TO FIND THE Y INTERCEPT X HAS TO BE =0 THUS WITH A SLOPE OF 3 WE NEED TO MULTIPLY 2*3=6 WHICH HAS TO BE ADDED TO THE Y COORDINATE OF 2 THUS WE HAVE 2+6=8 FOR THE Y INTERCEPT. IT LOOKS COMPLICATED BUT IF YOU USE GRAPH PAPER AND DRAW THE A LINE THROUGH POINTS(-2,2) WITH A SLOPE OF 4 YOU WILL SEE THAT IT WORKS) IF Y=5 THEN X=-1 OR (-1,5) IF X=-3 THEN Y=-3*3+8 OR Y=-9+8 OR Y=-1 (-3,-1)

Expressions-with-variables/37047: Could you please help me? I have been haveing serious problems with this equation. y=4x+1 y=4x-3 It has to be solved useing elimination, or substitution. And i have tryed both. Could you please help? 1 solutions Answer 22766 by checkley71(8403)   on 2006-05-09 20:40:41 (Show Source): You can put this solution on YOUR website! THERE IS NO COMMON SOLUTION AS THEY ARE PARALLEL LINES WITH A SLOPE OF 4 WITH Y INTERCEPTS OF 1 & -3

Geometric_formulas/37050: suppose that your school day begins at 7:30 am and ends 3:00 pm, You eat lunch at 11:00 am. If there is a fire drill at random time during the day, what is rthe probability that it begins beore lunch? 1 solutions Answer 22764 by checkley71(8403)   on 2006-05-09 20:34:40 (Show Source): You can put this solution on YOUR website! 7:30 TO 11:00 = 3.5 HOURS 11:00 TO 3:00 = 4 HOURS THUS THE PROBABILITY OF AN ALARM BEFORE LUNCH IS 3.5/(3.5+4) OR 3.5/7.5 OR .47 THE PROBABILITY IT WILL BE BEFORE LUNCH

Equations/37028: If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks? 1 solutions Answer 22762 by checkley71(8403)   on 2006-05-09 20:30:10 (Show Source): You can put this solution on YOUR website! 5/20+10/20+15/20=.25+.5+.75 AVERAGE TIME FOR 3 DRINKS IS .5 MIN. THUS FOR 20 DRINKS WE GET 3/20=.5/X OR 3X=10 OR X=3 1/3 MIN.

Linear-equations/37043: 3(x-2)=8 1 solutions Answer 22758 by checkley71(8403)   on 2006-05-09 20:08:50 (Show Source): You can put this solution on YOUR website! 3(X-2)=8 THEN 3X-6=8 OR 3X=14 OR X=14/3 PROOF 3(14/3-2)=8 OR 14-6=8 OR 8=8 IF X=2 THEN 3(2-2)=8 OR 3*0=8 OR 0=8 WHICH IS NOT VALID.

Polynomials-and-rational-expressions/37042: factor 9x^2-25x-6 1 solutions Answer 22756 by checkley71(8403)   on 2006-05-09 20:02:16 (Show Source): You can put this solution on YOUR website! 9X~2-25X-6 OR (9X+2)(X-3)=0 OR X=-2/9 & X=3

Quadratic_Equations/37033: This question is from textbook beginning Algebra (((14x2 – 20x +6))) I need to factor this polynomial completely and I am completely lost. 1 solutions Answer 22755 by checkley71(8403)   on 2006-05-09 20:00:01 (Show Source): You can put this solution on YOUR website! IF THE EQUATION IS 14X~2-20X+6 THEN (7X-3)(2X-2)=0 OR X=3/7 & X=1

Polynomials-and-rational-expressions/36999: This question is from textbook Algebra: Tools for a Changing World Please help with this: Solve each equation by factoring. 1 solutions Answer 22748 by checkley71(8403)   on 2006-05-09 16:59:58 (Show Source): You can put this solution on YOUR website! 2X~2-7X+5=0 OR (2X-5)(X-1)=0 OR 2X=5 OR X=5/2 & X=1

Square-cubic-other-roots/36931: hello, i need more help on these problem is factor out perfect squares ? 1)18 2)24 3)147 1 solutions Answer 22746 by checkley71(8403)   on 2006-05-09 16:55:35 (Show Source): You can put this solution on YOUR website! SQRT18=2*3*3 OR 3SQRT2 SQRT24=2*2*2*3 OR 2SQRT6 SQRT147=3*7*7 OR 7SQRT3

Inequalities/36991: A coffee merchant has coffee beans that sell for $9 per pound and $12 per pound. The two types are to be mixed to create 100 lb of a mixture that will sell for $11.25 per pound. How much of each of type of bean should be used in the mixture. 1 solutions Answer 22745 by checkley71(8403)   on 2006-05-09 16:43:48 (Show Source): You can put this solution on YOUR website! 900X+1200(100-X)=1125*100 OR 900X+120000-1200X=112500 OR -300X=7500 OR X=25 OR 25 POUNDS OF 9$ COFFEE WITH 75 POUNDS OF $12 COFFEE MAKES 100 POUINDS OF $11.25 PER POUND COFFEE PROOF 900*25+1200(100-25)=1125*100 OR 22500+90000=112500 OR 112500=112500

Expressions-with-variables/36995: x=y-4 2x+8=2y solve using elimination, substitution or graphing could this be no solutions? 1 solutions Answer 22744 by checkley71(8403)   on 2006-05-09 16:34:20 (Show Source): You can put this solution on YOUR website! X=Y-4 THEN 2(Y-4)+8=2Y OR 2Y-8+8=2Y OR 2Y-2Y=8-8 OR 0=0 NO SOLUTION

Quadratic_Equations/36997: Solve using the quadratic equation: x^2 - 3x - 23 = 5 3x^2 - 2x = 15x - 10 1 solutions Answer 22743 by checkley71(8403)   on 2006-05-09 16:31:22 (Show Source): You can put this solution on YOUR website! X~2-3X-23=5 OR X~2-3X-28=0 OR (X-7)(X+4)=0 OR X=7 & X=-4 3X~2-2X=15X-10 OR 3X~2-2X+15X+10 OR 3X~2+13X+10=0 OR (X+10)(X+3)=0 OR X=-10 & X=-3

Quadratic_Equations/36975: 4/(x-4)^2=1 i having alot of trouble with this one. I think i need to get the numerator over to the other side. 1 solutions Answer 22742 by checkley71(8403)   on 2006-05-09 13:56:47 (Show Source): You can put this solution on YOUR website! YOU'RE RIGHT. CROSS MULTIPLY THE DENOMINATOR BY 1 AND THAT WILL BE SET = 4*1 4/(X-4)~2=1 OR 4/(X~2-8X+16)=1 OR X~2-8X+16=4 OR X~2-8X+12=0 OR (X-6)(X-2)=0 OR X=6 & X=2

Polynomials-and-rational-expressions/36974: This question is from textbook I forgot how to multiply a binomial by a trinomial. I can't use the FOIL method, can I? Here's the problem: (4m+3)(4m-5m+6) 1 solutions Answer 22741 by checkley71(8403)   on 2006-05-09 13:51:53 (Show Source): You can put this solution on YOUR website! (4M+3)(4M-5M+6) OR (4M+3)(-M+6) OR -4M~2-3M+6M+18 OR -4M~2+3M+18 UNLESS THE SECOND EQUATION WAS SUPPOSED TO BE (4M~2-5M+6) THEN WE HAVE (4M+3)(4M~2-5M+6) OR 4M~3+12M~2-20M~2-15M+24M+18 OR 4M~3-8M~2+9M+18

Rectangles/36980: the perimeter of a rectangular picture is 34 cm. and the diagonal is 13 cm. Find the dimensions of the picture. 1 solutions Answer 22740 by checkley71(8403)   on 2006-05-09 13:41:27 (Show Source): You can put this solution on YOUR website! X~2+Y~2=13~2 & 2X+2Y=34 THUS X+Y=17 THUS X=17-Y OR (17-Y)~2+Y~2=169 or 289-34y+y~2+y~2=169 or 2y~2-34y+120=0 or y~2-17y+60=0 OR (y-12)(y-5)=0 or y=12 & y=5 THEN THE DIMEMSIONS ARE 12 & 5 PROOF 2*12+2*5=34 OR 24=10=34 OR 34=34 & 12~2+5~2=13~2 OR 144+25=169 OR 169=169

expressions/36981: 2x+3=9.x 1 solutions Answer 22739 by checkley71(8403)   on 2006-05-09 13:33:27 (Show Source): You can put this solution on YOUR website! 2X+3=9X OR 3=9X-2X OR 3=7X OR X=3/7 PROOF 2*3/7+3=9*3/7 OR 6/7+3=27/7 OR (6+21)7=27/7 OR 27/7=27/7

Age_Word_Problems/36984: Joseph is twelve years younger than Mack. Kevin is 1year younger than Joseph. The sum of their ages is sixty-two. How old is joseph. 1 solutions Answer 22737 by checkley71(8403)   on 2006-05-09 13:30:15 (Show Source): You can put this solution on YOUR website! M-12=J & K=J-1 & M+J+K=62 OR M=J+12 & K=J-1 THUS J+12+J+J-1=62 OR 3J=62+1-12 OR 3J=51 OR J=17 THEREFORE M-12=17 OR M=17+12 OR M=29 & K=17-1 OR K=16 PROOF 17+29+16=62 OR 62=62

Equations/36967: The equations of 2 lines are shown below: 2x-4y=6 3x+y=-5 What are the coordinates of the point of intersection? 1 solutions Answer 22721 by checkley71(8403)   on 2006-05-09 11:05:38 (Show Source): You can put this solution on YOUR website! 2X-4Y=6 3X+Y=-5 MULTIPLYING EQUATION 2 BY 4 WE GET 12X+4Y=20 ADDING TO EQUATION 12X+4Y=-20 2X-4Y=6 ------------- 14X=-14 OR X=-1 & 2(-1)-4Y=6 OR -2-4Y=6 OR -4Y=8 OR Y=8/-4 OR Y=-2

Linear_Algebra/36894: Jackie Ruben is bulding a childrens playhouse. she wants each window to have an area of 315 square inches for adequate air. For eye appeal, she wants each window to be six inches higher than wide. what are the dimensions of each window. 1 solutions Answer 22720 by checkley71(8403)   on 2006-05-09 10:14:58 (Show Source): You can put this solution on YOUR website! X*(X+6)=315 OR X~2+6X-315=0 OR (X+21)(X-15)=0 OR X=15 & X+6=21 PROOF 15*21=315 OR 315=315

Linear_Algebra/36830: a local park is 30 meters long by 20 meters wide. Plans are being made to double the area by adding a strip at one end and another of the same width on one side. find the width of the strips 1 solutions Answer 22718 by checkley71(8403)   on 2006-05-09 10:06:34 (Show Source): You can put this solution on YOUR website! (30+X)*(20+X)=2*(30*20) OR 600+50X+X~2=2*600 OR 600+50X+X~2=1200 OR X~2+50X-600 OR (X+60)(X-10)=0 OR X=10 OR 40*30=1200 OR 1200=1200 10 METERS ARE ADDED TO THE LENGTH & THE WIDTH

Linear_Algebra/36898: the difference of the squares of two consecutive odd integers is 48. find the integers. 1 solutions Answer 22714 by checkley71(8403)   on 2006-05-09 09:53:04 (Show Source): You can put this solution on YOUR website! (X+2)~2-X~2=48 OR X~2+4X+4-X~2=48 OR 4X=44 OR X=11 & 11+2=13 THUS 13~2-11~2=48 OR 169-121=48 OR 48=48

Equations/36934: Solve and show all work 3x^2 - 2x - 8=0 Thank you in advance! 1 solutions Answer 22713 by checkley71(8403)   on 2006-05-09 09:48:21 (Show Source): You can put this solution on YOUR website! 3X~2-2X-8=0 OR (3X+4)(X-2)=0 OR 3X=-4 OR X=-3/4 & X=2

Equations/36933: SOLVE AN PLEASE SHOW WORK 30x^2 - 9x - 3=0 Any help would be greatly appreciated. Thank you for your kindness! 1 solutions Answer 22712 by checkley71(8403)   on 2006-05-09 09:45:55 (Show Source): You can put this solution on YOUR website! 30X~2-9X-3=0 OR (5X+1)(6X-3)=0 OR 5X=-1 OR X=-1/5 & 6X=3 OR X=1/2 PROOF 30(-1/5)~2-9(-1/5)-3=0 OR 30/25+9/5-3=0 OR 6/5+9/5-3=0 OR 15/5-3=0 OR 3-3=0 OR 0=0

Linear_Algebra/36944: if a number is decreased by its reciprocal the result is 11 over 30. find the number. 1 solutions Answer 22711 by checkley71(8403)   on 2006-05-09 09:21:19 (Show Source): You can put this solution on YOUR website! X-1/X=11/30 OR (X~2-1)/X=11/30 OR 11X=30X~2-30 OR 30X~2-11X-30 OR (6X+5)(5X-6)=0 OR 6X=-5 OR X=-5/6 & 5X=6 OR X=6/5