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# Recent problems solved by 'edjones'

edjones answered: 7568 problems
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 Polynomials-and-rational-expressions/97942: write in simplest form. x^2 - 18x + 81 / x-91 solutions Answer 71248 by edjones(7569)   on 2007-09-13 11:03:38 (Show Source): You can put this solution on YOUR website!(x-9)(x-9)/x-9=x-9 Ed
 Linear-equations/97891: how do you graph this linear equation using three points? equation: 3x-4y=121 solutions Answer 71213 by edjones(7569)   on 2007-09-13 00:55:06 (Show Source): You can put this solution on YOUR website!3x-4y=12 you can use any real number for your 1st number (x or y)then find out the value of the other number (y or x) and put them in this form (x,y) Example: x=0 then -4y=12 y=12/-4=-3 the first point, (0,-3). 2nd: y=0 then 3x=12 x=12/3=4 another point, (4,0) 3rd: x=1 then 3-4y=12 -4y=12-3=9 y=9/-4=-2.25 (1,-2.25) the graph should look like this. Ed
 Numeric_Fractions/97901: I have been working on these questions and cannot get the answer. Could you kindly help me. 1. a^2-a= -a ( ) complete the factorization of each binomial 2. t^2 - 9w^2 Factor polunomial completely Thank you kindly.1 solutions Answer 71211 by edjones(7569)   on 2007-09-13 00:33:48 (Show Source): You can put this solution on YOUR website!1. a^2-a= -a(-a+1) 2.t^2 - 9w^2=(t-3w)(t+3w) Ed
 expressions/97899: 36s,when s=1021 solutions Answer 71210 by edjones(7569)   on 2007-09-13 00:25:48 (Show Source): You can put this solution on YOUR website!36s=36 times s or 36*s. Plug in 102 for s and you get: 36*102 36*102=3672 Ed
 Radicals/97886: This question is from textbook √8 √20 4√12 8√5+√51 solutions Answer 71206 by edjones(7569)   on 2007-09-12 23:28:27 (Show Source): You can put this solution on YOUR website! Ed
 Quadratic_Equations/97880: 5/12 , 3/20 find the lcd then c onvert each rational expression into an equivelant rational expression with the lcd as the denominator1 solutions Answer 71204 by edjones(7569)   on 2007-09-12 23:04:54 (Show Source): You can put this solution on YOUR website!12,24,36,48,60 20,40,60 25/60,9/60 the lcd or lcm (least common multiple)is the lowest number that both denominators go into evenly (ie. without leaving a remainder). To get the correct numerator divide the numerator into the lcd and multiply the result times the old numerator to get the new numerator. that gives the new number the same RATIO as the old number. Rational comes from the word ratio. Now you can add or subtract the numbers easily.(25/60+9/60=34/60=17/30)(25/60-9/60=16/60=4/15) Ed
 Numbers_Word_Problems/97840: I have some apples and you have apples. If I gave you one apple you will have twice as many as I do. However, if you give me one apple, we will both have the same amount. How many apples do we each have?1 solutions Answer 71199 by edjones(7569)   on 2007-09-12 22:27:37 (Show Source): You can put this solution on YOUR website!y=you m=me and/or I 2(m-1)=y+1...2m-2=y+1...2m-y=3 m+1=y-1...m-y=-2 2m-y=3 m-y=-2 ---------subtract the second from the 1st or change all the signs on the bottom and add m=5 substitute 5 for m in the second equation. 5-y=-2...-y=-7...y=7 Ans. you has 7 apples and me and/or I has 5 Check: If I gave you one apple you will have twice as many as I do(5-1=4 7+1=8). However, if you give me one apple, we will both have the same amount(5+1=6 7-1=6). Ed
 Polynomials-and-rational-expressions/97834: I'm not very sure if this is the correct submitted information, but the question is asking to find the indicated root of the cube root of a3b6c9. The numbers are actually meaning cubed, to the sixth power, etc. I don't quite understand, will you give me some steps to do this? 1 solutions Answer 71181 by edjones(7569)   on 2007-09-12 20:43:56 (Show Source): You can put this solution on YOUR website!If you use the following format we will know what you mean: cube root of a^3b^6c^9 Just divide the exponents by 3. Ed
 Human-and-algebraic-language/97820: erick's bank contains 66 quarters and dimes, of which Q are quarters. Find the total value of coins in dollars. He has \$13.80 answer with steps?1 solutions Answer 71175 by edjones(7569)   on 2007-09-12 20:32:54 (Show Source): You can put this solution on YOUR website!q+d=66 .25q+.10d=13.80 multiply the bottom equation by 4 and subtract the top from the bottom. q+.4d=55.2 q+d=66 ----------- -.6d=-10.8 divide -.6 into each side. d=18 replace d with 18 in the 1st equation. q+18=66 q=66-18 q=48 replace q & d with 48 & 18 respectively in the second equation. .25*48+.1*18=13.8 12+1.8=13.8 Ans.= \$12.00 in quarters. \$1.80 in dimes. Ed
 Linear-systems/97819: This question is from textbook find two consecutive even integers such that the smaller added to three times the larger gives a sum of 461 solutions Answer 71163 by edjones(7569)   on 2007-09-12 20:10:40 (Show Source): You can put this solution on YOUR website!let the 2 integers be: x, x+1 x+3(x+1)=46 x+3x+3=46 4x+3=46 4x=43 x=10.75 there is no answer x is not an integer. Check: 10.75+3(10.75+1)=46 10.75+32.25+3=46 Ed
 Inequalities/97818: solve the inequality -0.6p<-91 solutions Answer 71160 by edjones(7569)   on 2007-09-12 19:59:19 (Show Source): You can put this solution on YOUR website!divide -0.6 into each side. p<9/-.6 move the decimal points 1 to th right p<90/-6 p<-15 Ed
 Equations/97813: 3(2s-3)=-(7-s) can you show me the check too1 solutions Answer 71157 by edjones(7569)   on 2007-09-12 19:52:22 (Show Source): You can put this solution on YOUR website!3(2s-3)=-(7-s) 6s-9=-7+s subtract s and add 9 to each side. 5s=2 divide 5 into each side. s=2/5=.4 Check: 3(2*.4-3)=-(7-.4) 3(.8-3)=-7+.4 2.4-9=-6.6 6.6=6.6 Ed
 Length-and-distance/77684: The midpoint of a segment has coordinates M(8,2). One endpoint is A (6,0). Find the coordinates of the other endpoint.1 solutions Answer 71054 by edjones(7569)   on 2007-09-12 01:43:01 (Show Source): You can put this solution on YOUR website!M(x,y) are both 2 more than in A, so B(x,y) has to be 2 more than the midpoint. B(10,4)Ans. Ed
 Equations/97662: This question is from textbook algebra I'm trying to solve equations with variables on both sides. example:4(t+5)-5=6T-131 solutions Answer 71053 by edjones(7569)   on 2007-09-12 01:33:11 (Show Source): You can put this solution on YOUR website!4(t+5)-5=6t-13 4t+20-5=6t-13 no more parentheses. get all the t's on the right and the digits on the left. subtract 4t and add 13 to both sides. -4t+13+4t+20-5=6t-13-4t+13 voila! 28=2t divide 2 into both sides. 28/2=2t/2 14=t Remember to always try to Check your answer. 4(14+5)-5=6*14-13 56+20-5=84-13 71=71 Tip:By adding, subtracing, multiplying and dividing any number to BOTH sides of the equal sign you can get the variable and digits where you want them. Ed
 Square-cubic-other-roots/97579: Help with this question please!!! /1 solutions Answer 70997 by edjones(7569)   on 2007-09-11 20:26:53 (Show Source):
 Expressions-with-variables/97592: write an algebraic expression for 6 more than twice m 1 solutions Answer 70993 by edjones(7569)   on 2007-09-11 20:13:48 (Show Source): You can put this solution on YOUR website!2m+6
 Systems-of-equations/97584: 1 solutions Answer 70991 by edjones(7569)   on 2007-09-11 20:13:03 (Show Source): You can put this solution on YOUR website! multiply 3 times the top equation. 6x+2y=-24 multiply 6 times the bottom equation. 3x-2y=6 no more fractions. add the equations vertically. 9x=-18 x=-2 -6-2y=6 -2y=12 y=-6 Check: 2*-2+2/3*-6=-8...-4-4=-8 1/2*-2-1/3*-6=1...-1+2=1 Ed
 Geometry_Word_Problems/97568: B is the midpoint of line AC . Line AB = 8v and Line Ac= 3v+42 .what is BC? the only thing that i have is that line BC should be equal to line AB.1 solutions Answer 70981 by edjones(7569)   on 2007-09-11 19:55:24 (Show Source): You can put this solution on YOUR website!draw a line on paper. on th left end of the line put an A. on the right end put a C. Dead in the middle put a dot. above the dot write B. on the line between A and B write 8v. since B is the midpoint we know that line BC=8v also. Also, AC (the whole line)=3v+42 so, 2*8v=3v+42 16v=3v+42 subtract 3v from both sides. 13v=42 divide 13 into both sides. v=3.23 what is BC? v8. and v=3.23. Therefore v8=3.23*8=25.84 BC=25.84 Check: 2*25.84=3*3.23+42 51.68=51.69 (rounding error of .01) Ed
 Travel_Word_Problems/97020: If the speed of light is 3.00 x 10^8 m/sec, how long does it take to travel 2.29 x 10^11?1 solutions Answer 70969 by edjones(7569)   on 2007-09-11 19:18:48 (Show Source): You can put this solution on YOUR website!Distance=speed*time d=st t=d/s How we got 10^2. when we divide 10^11 by 10^8 we subtract the powers to get 10^3. 2.29/3=.763... we move the decimal point to the right 1 space giving 7.63... we decrease the power of 10^3 to 10^2 to account for moving the decimal point. Ed
 Inequalities/97558: This question is from textbook The cost to rent a car is \$19.50 plus \$.25 per mile. If you have \$44 to rent a car, what is the greatest number of miles that you can drive? 1 solutions Answer 70963 by edjones(7569)   on 2007-09-11 18:49:23 (Show Source): You can put this solution on YOUR website!x=number of mi 19.5+.25x=44 subtract 19.5 from each side. .25x=24.5 divide .25 into both sides. x=98 mi you can drive Ed
 Rational-functions/97559: Solve for "r" C=2(Pi)r1 solutions Answer 70960 by edjones(7569)   on 2007-09-11 18:43:18 (Show Source): You can put this solution on YOUR website!C=2(Pi)r divide 2pi into both sides. C/2pi=r
 Inequalities/97557: This question is from textbook Suppose it costs \$5 to enter a carnival. Each ride costs \$1.25. You have \$15 to spend at the carnival. What is the greatest number of rides that you can go on? 1 solutions Answer 70958 by edjones(7569)   on 2007-09-11 18:40:28 (Show Source): You can put this solution on YOUR website!10/1.25=8 rides
 Inequalities/97555: This question is from textbook Beatriz is in charge of setting up a banquet hall. She has five tables that will seat six people each. If no more than 62 people will attend, how many tables seating four people each will she need? 1 solutions Answer 70956 by edjones(7569)   on 2007-09-11 18:38:46 (Show Source): You can put this solution on YOUR website!5*6=30 62-30=32 people w/o a seat. 32/4=8 tables seating 4 required.
 Problems-with-consecutive-odd-even-integers/97554: What is the formula for finding 4 consecutive odd integers whose sum is 216?1 solutions Answer 70954 by edjones(7569)   on 2007-09-11 18:35:11 (Show Source): You can put this solution on YOUR website!x, x+2, x+4, x+6 are the consecutive odd integers. Formula: x+x+2+x+4+x+6=216 Ed
 test/97513: i have to find the center of a circle with an equation (x-2)squared+(y+3)squared=16 1 solutions Answer 70952 by edjones(7569)   on 2007-09-11 18:30:20 (Show Source): You can put this solution on YOUR website!(x-h)^2+(y-k)^2=r^2 (x-2)^2+(y+3)^2=16 h=2 k=-3 (2,-3) Ed
 Proportions/97508: sand/gravel = 4/5 = 64/x1 solutions Answer 70931 by edjones(7569)   on 2007-09-11 17:11:13 (Show Source): You can put this solution on YOUR website!Multiply x times each side. 4x/5=64 Multiply 5/4 times each side. x=64*5/4=80 Ed
 Equations/97462: A=2rh+2r^2; solve for h This is how I worked it out. A=2rh+2r^2 A-2r^2=2rh+2r^2-2r^2 A-2r^2=2rh A-2r^2/2r=2rh/2r A-r=h 1 solutions Answer 70929 by edjones(7569)   on 2007-09-11 17:04:41 (Show Source): You can put this solution on YOUR website!2rh+2r^2=A; solve for h subtract 2r^2 from each side. 2rh=A-2r^2 divide 2r into each side. . you did well. Your only mistake was your last step. if you divide 2r into you have to divide into both A and -2r^2 and you get which is equivalent to my answer. Ed
 Rational-functions/97494: This question is from textbook Holt Algebra 2 On one day the value of \$1.00 U.S. was equivalent to 0.77 euro. On the same day \$1.00 U.S. was equivalent to \$1.24 Canadian. Write a function to represent the value of Canadian dollars in Euros. What is the value of the function for an input of 5 to the nearest cent, and what does it represent?1 solutions Answer 70926 by edjones(7569)   on 2007-09-11 16:35:58 (Show Source): You can put this solution on YOUR website!1.24/.77=\$1.61 canadian for each euro. Ed
 Systems-of-equations/97493: x=8+3y 2x-5y=81 solutions Answer 70925 by edjones(7569)   on 2007-09-11 16:31:50 (Show Source): You can put this solution on YOUR website!x=8+3y 2x-5y=8 replace x with 8+3y in the 2nd equation. 2(8+3y)-5y=8 16+6y-5y=8 16+y=8 y=-8 x=8+3(-8)=8-24=-16 check: -16=8-24 -32-(5*-8)=8...-32-(-40)=8...-32+40=8 Ed
 Triangles/97490: what is the slope of a line y=2/3x+11 solutions Answer 70919 by edjones(7569)   on 2007-09-11 16:11:49 (Show Source): You can put this solution on YOUR website!y=2/3x+1 y=mx+b m=slope m=2/3 easy,no? Ed
 Linear_Equations_And_Systems_Word_Problems/97484: Ronald wants to sell his care through a broker who charges a commission of 10% of the selling price. Ronald still owes \$11.025 on the car. Ronald must get enough to at least pay off the loan. What is the range of selling price?1 solutions Answer 70918 by edjones(7569)   on 2007-09-11 16:08:26 (Show Source): You can put this solution on YOUR website!Ronald owes 11,025 on the car. sales price - commission = 11025 let x = sales price x-.1x=11025 .9x=11025 divide .9 into both sides x=11025/.9 x=\$12,250 Ed