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# Recent problems solved by 'rfer'

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 Angles/344215: determine the measure of an angle whose measure is 9 more than twice the measure of its supplement1 solutions Answer 246274 by rfer(12660)   on 2010-09-16 20:05:26 (Show Source): You can put this solution on YOUR website!x+2x+9=180 3x=171 x=57 degrees 2x+9=123 degrees
 Percentage-and-ratio-word-problems/344221: 11/2m - 3=13/21 solutions Answer 246272 by rfer(12660)   on 2010-09-16 20:02:54 (Show Source): You can put this solution on YOUR website!11/2m-3=13/2 11/2m=19/2 m=19/2*2/11 m=38/22 m=1 8/11
 Percentage-and-ratio-word-problems/344222: 4n-(3n+6)=-11 solutions Answer 246271 by rfer(12660)   on 2010-09-16 20:00:30 (Show Source): You can put this solution on YOUR website!4n-3n-6=-1 n=6
 Expressions-with-variables/344219: 2(3x - 4) = 291 solutions Answer 246270 by rfer(12660)   on 2010-09-16 19:58:59 (Show Source): You can put this solution on YOUR website!6x-8=29 6x=37 x=6.17
 Percentage-and-ratio-word-problems/344224: -1/8t+1/6=-1/121 solutions Answer 246269 by rfer(12660)   on 2010-09-16 19:57:05 (Show Source): You can put this solution on YOUR website!-1/8t=-1/12-2/12 -1/8t=-3/12 t=-3/12*-8/1 t=24/12 t=2
 Angles/344226: the ratio of the measure of two complementary angles is 1:2. what is the measure of the larger angle?1 solutions Answer 246266 by rfer(12660)   on 2010-09-16 19:55:04 (Show Source): You can put this solution on YOUR website!x+2x=90 3x=90 x=30 degrees 2x=60 degrees
 Graphs/344188: Write an inequality that demonstrates no less than \$6,000 and no more than \$10,000 on your landscaping project.1 solutions Answer 246262 by rfer(12660)   on 2010-09-16 19:07:02 (Show Source): You can put this solution on YOUR website!6000 =< x =< 10000
 Travel_Word_Problems/344192: if you travel in a car at a speed of 60 mi/hr, how long will it take you to travel 540 miles?1 solutions Answer 246261 by rfer(12660)   on 2010-09-16 19:06:00 (Show Source): You can put this solution on YOUR website!540/60=9 hrs
 Miscellaneous_Word_Problems/344189: how do you get the equation for the problem: The perimeter of a triangle is 76 cm. side A of the triangle is twice as long as side B. side C is 1 cm longer than side A. find the length of each side.1 solutions Answer 246260 by rfer(12660)   on 2010-09-16 19:04:35 (Show Source): You can put this solution on YOUR website!2x+x+2x+1=76 5x=75 x=15 degrees B 2x=30 degrees A 2x+1=31 degrees C
 Matrices-and-determiminant/344118: the sum of three numbers is 41. the first is ten less than the third and the second is one less than twice the third. What are the three numbers? 1 solutions Answer 246212 by rfer(12660)   on 2010-09-16 17:22:41 (Show Source): You can put this solution on YOUR website!x+x-10+2x-1=41 4x=52 x=13 third x-10=3 first 2x-1=25 second
 absolute-value/344133: hi im jessica hawkins and i was wondering if you can help me with adding and subtracting integers?? i am in the 7th grade.1 solutions Answer 246209 by rfer(12660)   on 2010-09-16 17:19:23 (Show Source): You can put this solution on YOUR website!post some of the problems so we can explain them.
 Square-cubic-other-roots/344128: what is the squar root of 8 to the second power1 solutions Answer 246208 by rfer(12660)   on 2010-09-16 17:18:25 (Show Source): You can put this solution on YOUR website!=8
 Numbers_Word_Problems/343760: The sum of two numbers is 180. One number is 5 times the other. What are the two numbers?1 solutions Answer 245951 by rfer(12660)   on 2010-09-15 21:58:03 (Show Source): You can put this solution on YOUR website!x+5x=180 6x=180 x=30 5x=150
 Systems-of-equations/343768: Solve the following system of equations by substitution. 5x+y=39 and y=21-3x.1 solutions Answer 245950 by rfer(12660)   on 2010-09-15 21:54:25 (Show Source): You can put this solution on YOUR website!y=21-3x 5x+y=39 5x+21-3x=39 2x=18 x=9 ----------------- y=21-3*9 y=-6 --------------- 5*9+-6=39
 Geometry_proofs/343793: solve the equations and state a reason for each step. p-1=6 2r-7=91 solutions Answer 245949 by rfer(12660)   on 2010-09-15 21:49:22 (Show Source): You can put this solution on YOUR website!p-1=6 add 1 p=7 -------------- 2r-7=9 add 7 2r=16 divide by 2 r=8
 Exponents-negative-and-fractional/343798: i need help on a problem. here it is: 4/5 + -1/3. can you help me answer it?1 solutions Answer 245947 by rfer(12660)   on 2010-09-15 21:47:34 (Show Source): You can put this solution on YOUR website!4/5-1/3 12/15-5/15=7/15
 Linear_Equations_And_Systems_Word_Problems/343797: Find the y intercept for 2x - 5y = 101 solutions Answer 245946 by rfer(12660)   on 2010-09-15 21:45:42 (Show Source): You can put this solution on YOUR website!5y=2x-10 y=2/5x-2 y int= (0,-2)
 Matrices-and-determiminant/343616: 7x-4=311 solutions Answer 245881 by rfer(12660)   on 2010-09-15 18:33:29 (Show Source): You can put this solution on YOUR website!7x=35 x=5
 Word_Problems_With_Coins/343550: Theo has \$5 more than Denise and Denise has \$11 more than Rudy. Together they have \$45. How much money does each person have?1 solutions Answer 245880 by rfer(12660)   on 2010-09-15 18:31:57 (Show Source): You can put this solution on YOUR website!R=x=6 D=x+11=17 T=x+16=22 ------------- x+x+11+x+16=45 3x=18 x=6
 Percentage-and-ratio-word-problems/343553: Three years after opening an account that paid simple interest of 6.45% annually , a depositor withdrew the \$2,902.50 in interest earned. How much money was left in the account?1 solutions Answer 245877 by rfer(12660)   on 2010-09-15 18:19:27 (Show Source): You can put this solution on YOUR website!I=Prt P=I/rt P=2902.50/0.0645*3 P=2902.50/0.1935 P=\$15,000
 Proportions/343588: jan buys 12 pen for \$10.00. each pen cost the same amount. write a proportion to find the number of pens jan can buy for \$15.00 1 solutions Answer 245874 by rfer(12660)   on 2010-09-15 18:13:03 (Show Source): You can put this solution on YOUR website!10/12=15/x 10x=180 x=18
 Equations/343598: Fill in the parenthese so that equation is correct. -48 divided by ( ) = -61 solutions Answer 245872 by rfer(12660)   on 2010-09-15 18:11:28 (Show Source): You can put this solution on YOUR website!+8
 Triangles/343116: The ratio of the angle measures in #BCR is 2 : 3 : 4. Find the angle measures.1 solutions Answer 245561 by rfer(12660)   on 2010-09-14 18:19:22 (Show Source): You can put this solution on YOUR website!2x+3x+4x=180 9x=180 x=20 2x=40 degrees 3x=60 degrees 4x=80 degrees
 Equations/343064: 3-(2t+5)=-121 solutions Answer 245560 by rfer(12660)   on 2010-09-14 18:17:26 (Show Source): You can put this solution on YOUR website!3-2t-5=-12 -2t=-10 t=+5
 Equations/343073: 9+5a=2a+91 solutions Answer 245559 by rfer(12660)   on 2010-09-14 18:16:18 (Show Source): You can put this solution on YOUR website!3a=0 a=0
 decimal-numbers/343072: is 5.2 greater than 5?1 solutions Answer 245558 by rfer(12660)   on 2010-09-14 18:14:53 (Show Source): You can put this solution on YOUR website!If they are both positive numbers, yes
 Linear-equations/343110: 1/4+5/8x=3/4 The solution is x= ?1 solutions Answer 245557 by rfer(12660)   on 2010-09-14 18:13:35 (Show Source): You can put this solution on YOUR website!1/4+5/8x=3/4 5/8x=3/4-1/4 5/8x=1/2 x=1/2*8/5 x=8/10 x=4/5
 Angles/343085: One angle is nine times it's supplement. Find the measures of the angles.1 solutions Answer 245556 by rfer(12660)   on 2010-09-14 18:11:37 (Show Source): You can put this solution on YOUR website!x+9x=180 10x=180 x=18 degrees 9x=182 degrees
 Angles/343082: what is the measure of an angle that is a complement of 101 solutions Answer 245555 by rfer(12660)   on 2010-09-14 18:09:43 (Show Source): You can put this solution on YOUR website!80 degrees
 Travel_Word_Problems/343092: if i drove 48.7 miles and took 1.2 hours to arrive how fast was i going 1 solutions Answer 245554 by rfer(12660)   on 2010-09-14 18:08:52 (Show Source): You can put this solution on YOUR website!48.7/1.2=x/1 1.2x=48.7 x=40.6 mph
 Equations/343097: -14=X+21 solutions Answer 245553 by rfer(12660)   on 2010-09-14 18:06:21 (Show Source): You can put this solution on YOUR website!x=-16