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# Recent problems solved by 'rfer'

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 Sequences-and-series/559241: cube root of 44.51 solutions Answer 363332 by rfer(12644)   on 2012-01-18 20:15:36 (Show Source): You can put this solution on YOUR website!=3.5437
 Equations/559225: 2x+7=91 solutions Answer 363330 by rfer(12644)   on 2012-01-18 20:13:34 (Show Source): You can put this solution on YOUR website!2x=9-7 2x=2 x=2/2 x=1
 test/559247: 15=-3(x-1)+91 solutions Answer 363328 by rfer(12644)   on 2012-01-18 20:11:51 (Show Source): You can put this solution on YOUR website!15=-3x+3+9 3x=12-15 3x=-3 x=-3/3 x=-1
 Travel_Word_Problems/558749: Ivy drives at a speed of 19 miles per hour. How long will it take her to drive 95 miles?1 solutions Answer 363161 by rfer(12644)   on 2012-01-17 21:57:57 (Show Source): You can put this solution on YOUR website!t=D/r t=95/19 t=5 hrs
 test/558764:  The Sum Of Two Numbers Is 62. The larger number is 12 more than the smaller. Find The Numbers. 1 solutions Answer 363160 by rfer(12644)   on 2012-01-17 21:56:01 (Show Source): You can put this solution on YOUR website!x+x+12=62 2x=62-12 2x=50 x=50/2 x=25 x+12=37
 Numbers_Word_Problems/558696: nine times the sum of 8 and some number is -18.1 solutions Answer 363151 by rfer(12644)   on 2012-01-17 21:29:38 (Show Source): You can put this solution on YOUR website!9(8+x)=-18 72+9x=-18 9x=-18-72 9x=-90 x=-90/9 x=-10
 expressions/558738: 5r=45 1 solutions Answer 363149 by rfer(12644)   on 2012-01-17 21:26:28 (Show Source): You can put this solution on YOUR website!r=45/5 r=9
 Percentage-and-ratio-word-problems/558746: sylvia is going to buy a new jacket. the regular price is \$68.00. the jacket is on sale for 25% off. there is 14% sales tax on the jacket. how much will Sylvia pay for the jacket1 solutions Answer 363148 by rfer(12644)   on 2012-01-17 21:25:23 (Show Source): You can put this solution on YOUR website!68*0.75=51 51*1.14=\$58.14
 Quadratic_Equations/558358: Please help. use the quadratic formula to solve the equation.x^2-x=-5 I got: x=1+i√19/2 , 1-i√19/2 Am I correct?1 solutions Answer 363050 by rfer(12644)   on 2012-01-17 13:34:48 (Show Source): You can put this solution on YOUR website!There are no zeros. It opens up with the vertex at (.5,4.75)
 Expressions-with-variables/558359: 2 more than twice a number1 solutions Answer 363049 by rfer(12644)   on 2012-01-17 13:29:31 (Show Source): You can put this solution on YOUR website!=2x+2
 Linear-equations/558367: Kelly earns 25% more than her sister, and together they earn \$1,012.50. How much does Kelly earn per week?1 solutions Answer 363048 by rfer(12644)   on 2012-01-17 13:27:43 (Show Source): You can put this solution on YOUR website!K=1.25x S=x x+1.25x=1012.50 2.25x=1012.50 x=1012.50/2.25 x=\$450 1.25x=\$562.50
 Average/558391: What's the average of \$87, \$63,and\$1351 solutions Answer 363047 by rfer(12644)   on 2012-01-17 13:22:52 (Show Source): You can put this solution on YOUR website!(87+63+135)/3=x 285/3=x x=95
 Graphs/558401: whats the answer to 3y+5=7??1 solutions Answer 363046 by rfer(12644)   on 2012-01-17 13:19:39 (Show Source): You can put this solution on YOUR website!3y=7-5 3y=2 y=2/3
 Money_Word_Problems/558408: During the Holidays the store sells a total of \$9,000. It was 60% of the total sales for the year. How much did the store make for the year?1 solutions Answer 363045 by rfer(12644)   on 2012-01-17 13:18:32 (Show Source): You can put this solution on YOUR website!9000/0.60=\$15,000
 Money_Word_Problems/558414: if you want 5000 dollars in 3 years, what is your initial deposit if it is compounded continuously at 4.5% 1 solutions Answer 363044 by rfer(12644)   on 2012-01-17 13:17:02 (Show Source): You can put this solution on YOUR website!A=Pe^rt 5000=P*2.7183^0.045*3 5000=P*1.1445 P=5000/1.1445 P=\$4,368.72
 Circles/558412: I have a question for my homework that I never learned, and I was wondering if it could be explained to me. If the area of a circle is 25 meters, what is its radius in meters?1 solutions Answer 363043 by rfer(12644)   on 2012-01-17 13:12:57 (Show Source): You can put this solution on YOUR website!A=pir^2 25=3.14r^2 25/3.14=r^2 7.96=r^2 sqrt 7.96=r r=2.82 meters
 Proportions/558139: a school purchased five new basketballs for 149.95. at that rate, how much more money will it cost the school to have 12 new basketballs in all?1 solutions Answer 362950 by rfer(12644)   on 2012-01-16 20:38:15 (Show Source): You can put this solution on YOUR website!149.95/5=x/12 5x=149.95*12 5x=1799.40 x=1799.40/5 x=\$359.88
 Proportions/558128: what is 15 to 4 as 9 to 2 times a number1 solutions Answer 362948 by rfer(12644)   on 2012-01-16 20:35:16 (Show Source): You can put this solution on YOUR website!15/4=9/2x 30x=36 x=36/30 x=1 6/30 x=1 1/5
 Coordinate-system/558188: We are trying to figure out how to solve the question- we don't want the answer just the steps needed to proceed. Find the slope of each line and tell whether the lines are parallel, perpendicular, or neither y=3x+1 y=3x-31 solutions Answer 362942 by rfer(12644)   on 2012-01-16 20:30:36 (Show Source): You can put this solution on YOUR website!slope m=3 parallel
 Money_Word_Problems/558194: Craig opens a savings account with \$850. His account earns 3% annual simple interest. How much interest will Craig earn in 18 months?1 solutions Answer 362940 by rfer(12644)   on 2012-01-16 20:26:51 (Show Source): You can put this solution on YOUR website!I=850*0.03*1.6 I=\$40.80
 Linear-equations/558004: Write an equation in standard form of the line that passes through (2,-3) and (-3,7).1 solutions Answer 362874 by rfer(12644)   on 2012-01-16 16:11:55 (Show Source): You can put this solution on YOUR website!m=(7--3)/(-3-2) m=10/-5 m=-2 ------------------ y=mx+b 7=-2*-3+b 7=6+b b=1 ============= -2x+y=1 2x-y=-1
 Geometry_Word_Problems/558012: The area of a square with side length of 11inches 1 solutions Answer 362871 by rfer(12644)   on 2012-01-16 16:06:42 (Show Source): You can put this solution on YOUR website!11*11=121 sq in
 Angles/558022: the measure of an angle is three more than twice its supplement. what is the measure of the angle?1 solutions Answer 362870 by rfer(12644)   on 2012-01-16 16:05:30 (Show Source): You can put this solution on YOUR website!x+2x+3=180 3x=177 x=59 2x+3=121
 Angles/557912: refer to the figure at the right to determine the measure of each given angle 1 solutions Answer 362823 by rfer(12644)   on 2012-01-16 12:57:57 (Show Source): You can put this solution on YOUR website!need more information
 Percentage-and-ratio-word-problems/557843: At a dinner party, 1/5 of the guests were vegetarian. 5/8 of those who eat meat, chose chicken. What fractional part of the guests ate chicken for dinner?1 solutions Answer 362822 by rfer(12644)   on 2012-01-16 12:57:13 (Show Source): You can put this solution on YOUR website!4/5 ate meat 4/5*5/8=20/40=1/2 ate chicken
 Evaluation_Word_Problems/557907: A child's raincoat is on sale for \$18.00 after a 40% markdown. What is the raincoat's original price?1 solutions Answer 362820 by rfer(12644)   on 2012-01-16 12:52:46 (Show Source): You can put this solution on YOUR website!18/0.60=\$30
 Linear-equations/557854: Plumbing: A plumber wishes to cut a 26 foot length of pipe into two pieces. the longer piece needs to be 7 feet less than twice the length of the shorter piece. where should the plumber cut the piece?1 solutions Answer 362819 by rfer(12644)   on 2012-01-16 12:51:52 (Show Source): You can put this solution on YOUR website!x+2x-7=26 3x=33 x=11 2x-7=15
 Polygons/557904: The Measure of the three angles of a triangle are: x, 2x, 3x What is the value of "X", and What type of triangle is it?1 solutions Answer 362818 by rfer(12644)   on 2012-01-16 12:48:56 (Show Source): You can put this solution on YOUR website!x+2x+3x=180 6x=180 x=30 degrees Right triangle
 Probability-and-statistics/557862: a truck is carrying water bottles. one fourth of the total number of bottles in the truck plus 18 bottles is equal to 56 bottles. how many water bottles is the truck carrying?1 solutions Answer 362817 by rfer(12644)   on 2012-01-16 12:47:10 (Show Source): You can put this solution on YOUR website!56-18/0.25=x 38/0.25=152 total
 Numbers_Word_Problems/557879: A number plus seven equals twice the number minus five, what is the number ?1 solutions Answer 362816 by rfer(12644)   on 2012-01-16 12:41:09 (Show Source): You can put this solution on YOUR website!x+7=2x-5 x-2x=-5-7 -x=-12 x=12
 Linear-equations/557880: solve the equation; 3x-4-5x=x+4+x. i understand the basic principle of how to work the problem out but not understanding how to get the answer given. 1 solutions Answer 362815 by rfer(12644)   on 2012-01-16 12:39:06 (Show Source): You can put this solution on YOUR website!-2x-4=2x+4 -2x-2x=4+4 -4x=8 x=8/-4 x=-2