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# Recent problems solved by 'rfer'

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 Pythagorean-theorem/602627: What happens if the hypotenuse doesn't have a square root? For example, 1566 is the hypotenuse but it does not have a square root, what do you do?1 solutions Answer 380350 by rfer(12662)   on 2012-04-23 19:36:51 (Show Source): You can put this solution on YOUR website!Sq rt of 1566 is 39.573
 test/602080: a + 6a - 9 = 301 solutions Answer 380113 by rfer(12662)   on 2012-04-22 19:32:03 (Show Source): You can put this solution on YOUR website!7a=39 a=39/7 a=5.57
 percentage/602094: 81% of 200 is what number?1 solutions Answer 380112 by rfer(12662)   on 2012-04-22 19:30:27 (Show Source): You can put this solution on YOUR website!200*0.81=162
 Graphs/601974: Hello I am having trouble with finding out the solution sets. the problem is 2/3(3x-6)> 12. Then i get multiple choice answers like the solution set is {x|x > < and to simplify my answer please help1 solutions Answer 380086 by rfer(12662)   on 2012-04-22 16:57:13 (Show Source): You can put this solution on YOUR website!2x-4>12 2x>16 x>8
 Angles/601985: The ratio of the measure of two supplementary angles is 3:7. Find the measure of each angle.1 solutions Answer 380085 by rfer(12662)   on 2012-04-22 16:55:27 (Show Source): You can put this solution on YOUR website!3x+7x=180 10x=180 x=18 3x=54 7x=126
 Linear-equations/602001: the slope of x+y=7 1 solutions Answer 380084 by rfer(12662)   on 2012-04-22 16:52:48 (Show Source): You can put this solution on YOUR website!y=-x+7 slope m=-1
 Mixture_Word_Problems/601524: please help me with this question Explain the difference between finding the following two solutions: What is 15% of 50? 50 is 15% of what? 1 solutions Answer 379837 by rfer(12662)   on 2012-04-20 20:45:26 (Show Source): You can put this solution on YOUR website!50*0.15=7.5 50/0.15=333.33
 Rectangles/601404: Multiplying the width times the length of a rectangle provides its1 solutions Answer 379757 by rfer(12662)   on 2012-04-20 13:40:37 (Show Source): You can put this solution on YOUR website!=area
 absolute-value/601420: 3x – 5(2/5+ 3) 1 solutions Answer 379756 by rfer(12662)   on 2012-04-20 13:39:43 (Show Source): You can put this solution on YOUR website!3x-2-15= 3x-17
 Expressions-with-variables/601375: I need to learn to solve an equation. here is the problem i am having difficulty with.2/3(z+3)=5-z1 solutions Answer 379727 by rfer(12662)   on 2012-04-20 10:52:35 (Show Source): You can put this solution on YOUR website!2/3z+2=5-z 5/3z=3 z=(3)/(5/3) z=3*3/5 z=9/5 z=1 4/5
 percentage/601072: On the first day,60% of the 300 tickets were sold.How many tickets were sold on the first day?1 solutions Answer 379600 by rfer(12662)   on 2012-04-19 17:36:41 (Show Source): You can put this solution on YOUR website!300*0.60=180
 Linear_Algebra/601082: simplify completely 3(2x+1)-4x1 solutions Answer 379599 by rfer(12662)   on 2012-04-19 17:35:03 (Show Source): You can put this solution on YOUR website!6x+3-4x= 2x+3
 Money_Word_Problems/600643: A theater group made appearances in two cities. The hotel charge before tax in the second city was \$1500 higher than in the first. The tax in the first city was 3.5%, and the tax in the second city was 4.5%. The total hotel tax paid for the two cities was 427.50. How much was the hotel charge in each city before tax?1 solutions Answer 379445 by rfer(12662)   on 2012-04-18 18:36:06 (Show Source): You can put this solution on YOUR website!0.035x+0.045x=427.50 0.08x=427.50 x=427.50/0.08 x=5343.75 ------------- x+x+1500=5343.75 2x=5343.75-1500 2x=3843.75 x=1921.88 first 1921.88+1500=3421.88 second
 Numeric_Fractions/600715: How do you work this problem? 5 2/5 - 1 4/5 1 solutions Answer 379439 by rfer(12662)   on 2012-04-18 18:29:17 (Show Source): You can put this solution on YOUR website!27/5-9/5=18/5=3 3/5
 Square-cubic-other-roots/600649: x exponent 2 = 161 solutions Answer 379438 by rfer(12662)   on 2012-04-18 18:27:49 (Show Source): You can put this solution on YOUR website!x^2=16 x=sqrt 16 x=4
 Rectangles/600680: if a rectangle has a length of 12cm. What is the perimeter 1 solutions Answer 379437 by rfer(12662)   on 2012-04-18 18:26:13 (Show Source): You can put this solution on YOUR website!Not enough information.
 Probability-and-statistics/600709: I am trying to solve for P The equation is p + Q = 1 My problem is p + 0.3 = 1 I am in a college Biology class and they threw some math problem to us at the end of the semester, and I haven't had math in over 10 years! Can you help? 1 solutions Answer 379436 by rfer(12662)   on 2012-04-18 18:23:51 (Show Source): You can put this solution on YOUR website!p=1-0.3 p=0.7
 test/600612: 2 3/4 divided by 19 8/41 solutions Answer 379409 by rfer(12662)   on 2012-04-18 16:12:48 (Show Source): You can put this solution on YOUR website!(11/4)/(84/4)= (11/4)(4/84)=44/336=11/84
 Travel_Word_Problems/600517: i a car travels 205 kilometres in 210 minutes what is its average speed 1 solutions Answer 379373 by rfer(12662)   on 2012-04-18 10:54:42 (Show Source): You can put this solution on YOUR website!205/3.5=58.6 kph
 Money_Word_Problems/600316: Use the compound interest formula A=P[1+(r/n)]^(nt) Find the accumulated value of an investment of \$1600 at 12% compounded quarterly for 4 years.1 solutions Answer 379308 by rfer(12662)   on 2012-04-17 23:24:03 (Show Source): You can put this solution on YOUR website!A=1600(1+.03)^16 A=1600(1.6) A=\$2560
 Numeric_Fractions/600362: If there is a remainder, write the answer as a mixed number. 145 divided by 6 1 solutions Answer 379306 by rfer(12662)   on 2012-04-17 23:20:43 (Show Source): You can put this solution on YOUR website!145/6=24 17/100
 test/600299: Today only, a sofa is being sold at a 67% discount. The sale price is \$184.80. What was the price yesterday. 1 solutions Answer 379305 by rfer(12662)   on 2012-04-17 23:16:41 (Show Source): You can put this solution on YOUR website!184.80/0.33=\$560.00
 Travel_Word_Problems/600370: if i travel 17 miles in 30 minutes how fast did i go.1 solutions Answer 379301 by rfer(12662)   on 2012-04-17 23:13:45 (Show Source): You can put this solution on YOUR website!=34 mph
 test/599793: Square root of 20/ square root of 51 solutions Answer 379083 by rfer(12662)   on 2012-04-16 19:51:59 (Show Source): You can put this solution on YOUR website!20/5=4 sqrt 4=2
 expressions/599799: what is (2.49*10 to the 4th power)/(3.0*10 to the 2nd power) written scientific notation?1 solutions Answer 379080 by rfer(12662)   on 2012-04-16 19:48:07 (Show Source): You can put this solution on YOUR website!2.49*10^4/3.0*10^2= 0.83*10^2= 8.3*10^1= 83
 Triangles/599186: If a right triangle has the angles of 32 and 98 what is the measure of the third angle?1 solutions Answer 378869 by rfer(12662)   on 2012-04-15 17:03:13 (Show Source): You can put this solution on YOUR website!180-98-32=50 degrees
 Divisibility_and_Prime_Numbers/599148: How do you know when it is divisible by 2,9,5,8 1 solutions Answer 378867 by rfer(12662)   on 2012-04-15 17:02:06 (Show Source): You can put this solution on YOUR website!By knowing your mutiplication tables.
 Geometric_formulas/599168: Hey, could someone please help me. What is the approximate volume of the cylinder if the top if 12 in. across and the side given is 36 in? Thanks you!1 solutions Answer 378866 by rfer(12662)   on 2012-04-15 17:00:37 (Show Source): You can put this solution on YOUR website!v=pir^2h v=3.14*6^2*36 v=4069.44 cu in
 �t�e�s�t/599179: What is the median of 26, 20, 19, 16, 16, 15, 14, 14, 13, 13?1 solutions Answer 378865 by rfer(12662)   on 2012-04-15 16:57:42 (Show Source): You can put this solution on YOUR website!166/10=16.6
 Travel_Word_Problems/599191: what is the average speed of a car that travels 200 miles in 4 hours?1 solutions Answer 378864 by rfer(12662)   on 2012-04-15 16:54:15 (Show Source): You can put this solution on YOUR website!r=d/t r=200/4 r=50 mph
 Polynomials-and-rational-expressions/599202: How do you do collect like terms in this problem? Thanks for your help! Collect like terms. 3x-8x1 solutions Answer 378863 by rfer(12662)   on 2012-04-15 16:53:04 (Show Source): You can put this solution on YOUR website!3x-8x=-5x