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# Recent problems solved by 'rfer'

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 Linear-equations/519110: How do you find the equation of the line parallel to y=1/3x +2 and contains the point (-18,2)?1 solutions Answer 345389 by rfer(12660)   on 2011-10-21 16:46:44 (Show Source): You can put this solution on YOUR website!y=mx+b 2=1/3*-18+b 2=-6+b b=2+6 b=8 ----------- y=1/3x+8
 Pythagorean-theorem/519100: A right triangle has an area of 60 square millimeters. One leg has a length of 6 millimeters. What is the length of the other leg1 solutions Answer 345386 by rfer(12660)   on 2011-10-21 16:45:03 (Show Source): You can put this solution on YOUR website!(2*60)/6=20
 Numeric_Fractions/519080: 3/10 divided by 5/71 solutions Answer 345385 by rfer(12660)   on 2011-10-21 16:42:36 (Show Source): You can put this solution on YOUR website!(3/10)/(5/7)= 3/10*7/5=15/70=3/14
 Average/519091: Paul has grades 70 and 68 on his first two test what must he score on his third test in order to have an average of at least 70!? What does the equation look like/ 1 solutions Answer 345383 by rfer(12660)   on 2011-10-21 16:40:39 (Show Source): You can put this solution on YOUR website!(70+68+x)/3=70 138+x=70*3 138+x=210 x=210-138 x=72
 Human-and-algebraic-language/519112: A person deposited \$500.00 in a savings account that pays 5% annual interest that is compounded yearly. At the end of 10 years, how much money will be in the savings account? 1 solutions Answer 345381 by rfer(12660)   on 2011-10-21 16:37:12 (Show Source): You can put this solution on YOUR website!A=P(1+r)^t A=500(1.05)^10 A=500*1.62889 A=\$814.45
 Linear-equations/518434: write the equation in slope intercept form of a line with a slope of 1 which contains the point (2,4)1 solutions Answer 345184 by rfer(12660)   on 2011-10-20 13:51:32 (Show Source): You can put this solution on YOUR website!y=mx+b 4=1*2+b 4=2+b 4-2=b b=2 ------------ y=x+2
 Equations/518447: Solve this equation 3/4-2x=7/101 solutions Answer 345183 by rfer(12660)   on 2011-10-20 13:48:57 (Show Source): You can put this solution on YOUR website!-2x=7/10-3/4 -2x=14/20-15/20 -2x=-1/20 x=(-1/20)/(-2/1) x=-1/20*-1/2 x=1/40
 Linear-equations/518467: if you cannot find a solution label the lines as parallel or coinciding and explain why y=3x-9 2x-y=61 solutions Answer 345181 by rfer(12660)   on 2011-10-20 13:46:21 (Show Source): You can put this solution on YOUR website!2x-3x-9=6 -x=15 x=-15 ------------- 2*-15-y=6 -30-y=6 -y=36 y=-36 ------------- y=3*-15-9 y=-45-9 y=-54 ----------- no solution
 Polynomials-and-rational-expressions/518452: multiply (4x+3)(6x^2+4x+2) simplify1 solutions Answer 345180 by rfer(12660)   on 2011-10-20 13:42:17 (Show Source): You can put this solution on YOUR website!24x^3+16x^2+8x+18x^2+12x+6= 24x^3+34x^2+20x+6
 Polynomials-and-rational-expressions/518453: multiply (w+t)(w^2-wt+t^2) simploify1 solutions Answer 345178 by rfer(12660)   on 2011-10-20 13:39:23 (Show Source): You can put this solution on YOUR website!w^3-w^2t+wt^2+w^2t-wt^2+t^3= w^3+t^3
 Graphs/518256: what is the intercepts of x-4y=41 solutions Answer 345110 by rfer(12660)   on 2011-10-19 23:51:51 (Show Source): You can put this solution on YOUR website!-4y=-x+4 y=-x/-4+4/-4 y=1/4x-1 ----------- y int=(0,-1) x int=(4,0)
 percentage/518251: A lawn bench price at \$523.89 was just discounted 10%. Then an additional 4% discount is added for paying cash.If you pay with cash, what will the bench cost you after the discounts are applied? B. If there was a 20% mark-up from the wholesale cost to get the price of \$523.89, what was the wholesale cost or the cost to the dealer? 1 solutions Answer 345109 by rfer(12660)   on 2011-10-19 23:47:38 (Show Source): You can put this solution on YOUR website!A) 523.89*0.90=471.50 471.50*0.96=\$452.64 B) 523.89/1.20=\$436.58
 Word_Problems_With_Coins/518253: Lisa and Ann made a total of \$65 baby-sitting. Lisa made \$5 more than 1/2 of what Ann made. How much did each one make?1 solutions Answer 345107 by rfer(12660)   on 2011-10-19 23:43:08 (Show Source): You can put this solution on YOUR website!x+0.5x+5=65 1.5x=60 x=60/1.5 x=\$40 0.5x+5=\$25
 Linear-equations/518206: Solve. -9y-12(2-3)=-25-2(y+6) Please show all of your work.1 solutions Answer 345106 by rfer(12660)   on 2011-10-19 23:35:06 (Show Source): You can put this solution on YOUR website!-9y-24+36=-25-2y-12 -9y+12=-37-2y -7y=-49 y=-49/-7 y=7
 Rectangles/518232: can you please help me find the length of one of the diagonals of a rectangle with a length of 7 centimeters and a width of 51 solutions Answer 345105 by rfer(12660)   on 2011-10-19 23:32:26 (Show Source): You can put this solution on YOUR website!a^2+b^2=c^2 49+25=74 sqrt 74=8.6 cm
 Coordinate-system/518247: slope-intercept form of the equation of the line passing through the point (3, -6) and parallel to the line y = 5x + 31 solutions Answer 345104 by rfer(12660)   on 2011-10-19 23:29:44 (Show Source): You can put this solution on YOUR website!-6=5*3+b -6=15+b -21=b ------------ y=5x-21
 Numbers_Word_Problems/517931: a number "r" decreased by 13 is at most 15??1 solutions Answer 345011 by rfer(12660)   on 2011-10-19 18:10:30 (Show Source): You can put this solution on YOUR website!r-13 <= 15
 Inequalities/518010: John consumes between 1500 and 2000 calories per day. This is reflected by which inequality? 1 solutions Answer 345010 by rfer(12660)   on 2011-10-19 18:08:55 (Show Source): You can put this solution on YOUR website!1500 < x < 2000
 Circles/518008: The radius of a circle is 1 millimetere.what is the circles circumference ?1 solutions Answer 345009 by rfer(12660)   on 2011-10-19 18:07:17 (Show Source): You can put this solution on YOUR website!c=3.14*2r c=3.14*2 c=6.28 mill
 absolute-value/517974: Negative x minus 2 equals x plus 141 solutions Answer 345007 by rfer(12660)   on 2011-10-19 18:05:15 (Show Source): You can put this solution on YOUR website!-x-2=x+14 -2x=16 x=16/-2 x=-8
 Quadratic_Equations/517965: I need the answer for a few problems: what is the solution set for the quadratic equation: x squared+8x +4=0? 1 solutions Answer 345006 by rfer(12660)   on 2011-10-19 18:02:39 (Show Source): You can put this solution on YOUR website!zero's (-0.5,0) & (-7,0) vertex= (-4,-12)
 Average/517970: a student scored 71, 83, and 96 on three algebra tests. what must he score on the fourth test in order to have an average of at least 85?1 solutions Answer 345001 by rfer(12660)   on 2011-10-19 17:56:06 (Show Source): You can put this solution on YOUR website!(71+83+96+x)/4=85 250+x=85*4 250+x=340 x=340-250 x=90
 Linear-equations/517977: -2(3x-1)=4(3x-2)-x 1 solutions Answer 344998 by rfer(12660)   on 2011-10-19 17:51:02 (Show Source): You can put this solution on YOUR website!-6x+2=12x-8-x -6x-11x=-8-2 -17x=-10 x=-10/-17 x=10/17 x=0.588
 Surface-area/517993: The area of the base of a cylinder is 200, so what is the radius?1 solutions Answer 344995 by rfer(12660)   on 2011-10-19 17:47:46 (Show Source): You can put this solution on YOUR website!A=3.14r^2 200=3.14r^2 200/3.14=r^2 r^2=63.69 r=7.98
 Functions/517988: what's the answer to 2 over 9 plus 2 over 9 times 1 over 4 in simplest form1 solutions Answer 344993 by rfer(12660)   on 2011-10-19 17:45:46 (Show Source): You can put this solution on YOUR website!2/9+2/9*1/4= multiply first 2/9+2/36= reduce 2/9+1/18= get common denominator 4/18+1/18=5/18
 Geometry_Word_Problems/517989: how do you figure out how many 2in square blocks can fit inside a box of 10in by 20in. please help thank you.1 solutions Answer 344989 by rfer(12660)   on 2011-10-19 17:42:27 (Show Source): You can put this solution on YOUR website!10*20=200 sq inches 2*2=4 sq inches 200/4=50 blocks
 Travel_Word_Problems/517991: a boat travels 36 miles in one hour what is its speed in miles per minute 1 solutions Answer 344988 by rfer(12660)   on 2011-10-19 17:40:34 (Show Source): You can put this solution on YOUR website!36/60=0.6 miles per min
 Linear_Equations_And_Systems_Word_Problems/517985: Together jane and jill have 32 dolls. jill has 6 more dolls than jane does. how many dolls does each girl have?1 solutions Answer 344985 by rfer(12660)   on 2011-10-19 17:39:16 (Show Source): You can put this solution on YOUR website!x+x+6=32 26=32-6 2x=26 x=26/2 x=13 x+6=19
 Distributive-associative-commutative-properties/517406: simplify using the distributive property. 98 * 71 solutions Answer 344795 by rfer(12660)   on 2011-10-18 21:07:36 (Show Source): You can put this solution on YOUR website!=686
 Equations/517411: -12=n/3+3 (please and thankyou)1 solutions Answer 344793 by rfer(12660)   on 2011-10-18 21:05:15 (Show Source): You can put this solution on YOUR website!-12-3=n/3 -15=n/3 -15/3=n -5=n
 test/517453: how do I solve 4 * 1/3 ? 1 solutions Answer 344790 by rfer(12660)   on 2011-10-18 21:02:14 (Show Source): You can put this solution on YOUR website!4/1*1/3=4/3=1 1/3