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# Recent problems solved by 'Bb'

 Miscellaneous_Word_Problems/737830: You are choosing among three apartments. Apartment 1 costs \$700 per month, and lets you walk to work. Apartment 2 costs \$600 per month and would let you get to work via the bus. A bus pass costs \$40 per month. Apartment 3 costs \$400 per month but would require a car which you estimate would cost \$400 per month. Which apartment is the most economical? 1 solutions Answer 450580 by Bb(19)   on 2013-04-15 12:34:16 (Show Source): You can put this solution on YOUR website!Lets start getting all the apartments to show the total monthly costs Apartment 1 \$700 a month Apartment 2 \$600+40= \$640 a month Apartment 3 \$400+400= \$800 a month The most economical apartment would be Apartment 2 because it costs the least at \$640 a month total cost.
 Miscellaneous_Word_Problems/737824: You find an apartment that rents for \$320 per month. You are also responsible for utilities that average \$80 per month. What is your likely yearly cost for this apartment?1 solutions Answer 450579 by Bb(19)   on 2013-04-15 12:29:56 (Show Source): You can put this solution on YOUR website!The monthly costs are \$320 per month and \$80 per month. Because these costs are monthly use m to show that these costs occur monthly. 320m+80m=400m In order to calculate how much this will cost per year substitute 12 for m because there are 12 months in a year 400m=400*(12) 400*(12)= \$4800 per year. The yearly cost for the apartment is \$4800.
 Quadratic_Equations/737825: x2 -4x-32 1 solutions Answer 450578 by Bb(19)   on 2013-04-15 12:23:14 (Show Source): You can put this solution on YOUR website!All quadratic equations can be solved by the quadratic equation which is Lets start by defining a, b, and c a=1 b=-4 c=-32 Now we substitute the variables for the numbers and solve the equation and Simply both equations and and x=8 and -4
 Numeric_Fractions/612131: What is 25/48 + 15/22? Please show all work and simplify. Thank you.1 solutions Answer 385324 by Bb(19)   on 2012-05-17 19:50:29 (Show Source): You can put this solution on YOUR website!To start out the denominator of each fraction needs to be the same so you need to find the common denominator for this it is 528 so you need to multiply by and you will get then you need to multiply by and you get then you can add you must then simply the fraction and you will get
 Travel_Word_Problems/612169: Two cars leave the origin; one goes north at 45 mph and the other goes south at 50 mph. After how many hours will they be 300 miles apart? 1 solutions Answer 385319 by Bb(19)   on 2012-05-17 19:38:01 (Show Source): You can put this solution on YOUR website!Lets start by setting up an equation. . then divide each side by 90
 Functions/612160: Media services charges \$30 for a phone and \$20/month for its economy plan. Find a model that determines the total cost c(t), of operating a media service phone for t months.1 solutions Answer 385318 by Bb(19)   on 2012-05-17 19:33:28 (Show Source): You can put this solution on YOUR website!Lets start by assigning variables to each part of the equation. p (phone)=\$30 m (monthly charge)=\$20 t (time in months). Now lets place the numbers in for the variables. is going to be the final equation.
 expressions/612181: 48-36*(11-2) 1 solutions Answer 385315 by Bb(19)   on 2012-05-17 19:25:46 (Show Source): You can put this solution on YOUR website!In order to solve this equation you must go through the order of operations which is parentheses, exponents & roots, multiplication and division, addition and subtraction. So (11-2)=9 so you then take 36*9=324 You then take 48-324=-276 So the final answer is -276
 Exponents-negative-and-fractional/610645: what is n^2/n^4 answer given in positive exponents only 1 solutions Answer 384493 by Bb(19)   on 2012-05-13 22:31:31 (Show Source): You can put this solution on YOUR website! because the coefficients are the same you are able to cancel out the powers there are 2 on the top and 4 on the bottom so 4-2=2 which will leave you with a
 Average/610598: a student averages 84 on 5 tests. if the student received grades of 84, 82, 81, and 79 on the first four tests, what grade did the student receive on the fifth exam?1 solutions Answer 384492 by Bb(19)   on 2012-05-13 22:26:28 (Show Source): You can put this solution on YOUR website!In order to get an average of 84% on 5 exams you can take this tells you that if you subtract the known averages from 420 it gives you the fifth exam score. The equation looks like this . To test this you can add up all five exam scores and find the average. This will show that 94 on the last exam is correct.
 Equations/609777: f(x)=2x-7 g(x)=x+4/3 This is the equation how do I solve? f(g(8))1 solutions Answer 384312 by Bb(19)   on 2012-05-12 23:09:16 (Show Source): You can put this solution on YOUR website!To start out you in the f(x) equation you are going to substitute the g(x) equation with x=8 which looks like this: 2[(8+4)/3]-7 which will equal 2*(12/3)-7=2*4-7=1 so f(g(8))=1
 Linear-equations/35104: This question is from textbook I need help solving this equation: -0.42x=-2.1421 solutions Answer 21301 by Bb(19)   on 2006-04-26 15:54:21 (Show Source): You can put this solution on YOUR website!In order to solve this problem you would take the side with the x on it and divide that number by the oter number so if your problem looked like this -.67x=-8.878 you'd divide -8.878 by -.67 and you'd get x=13.25
 absolute-value/30266: what is the absolute value of|8|? 1 solutions Answer 16947 by Bb(19)   on 2006-03-14 19:57:16 (Show Source): You can put this solution on YOUR website!in order to find the absolute value of something it's basicly just the number but if the numbers is negitive its the positive form of that number so the answer to that qustion would be 8 but if a qustion like this came up |-9| the absolute value would be 9 i hope this helped you with your homework good luck
 Inequalities/30171: I am not good with inequalities so i need help with the following... 21-y=(-87)+2y 6-y=(-y)+2 4/3u-6=7/3u+8 7+6z=8z-13 12p=6-3p 5/6t+4=2-1/6t 3+2(k+1)=6+3k 6r+5=8(r+2)-2r (-2)(2c-4=1/3(-12c+24) u/0.3=4u+6.28 0.3x-15=0.2x-51 solutions Answer 16859 by Bb(19)   on 2006-03-13 21:14:42 (Show Source): You can put this solution on YOUR website!ok i'm not going to answer all of these but i'll teach u how to do the first one 21-y=-87+2y ok 1st u'd +87 to 21 and u get 108-y=2y then u add y to 2y and u get 108=3y then divide both sides by 3 and u get 36 do the rest of the questions that way and u'll be fine i hope this helped u!!
 Percentage-and-ratio-word-problems/29663: What is tax on \$11.48, if tax is 8.125% ?1 solutions Answer 16377 by Bb(19)   on 2006-03-08 21:25:43 (Show Source): You can put this solution on YOUR website!ok in order to do this you just have to do 11.48*8.125% then you add that amount to 11.48 and your answer will be \$22.18 i hoped that helped you good luck with your homework
 Linear-equations/29450: my son needs help with these also 7n+14-9n=26 5x=4=x-4 1 solutions Answer 16234 by Bb(19)   on 2006-03-06 21:54:53 (Show Source): You can put this solution on YOUR website!ok for the 1st problem 7n+14-9n=26 u -14 on both sides and get 7n-9n=12 then u do simplify 7n-9n and u get -2n=12 then u divide both sides by -2 and u get your answer -6 to check your answer place -6 in for the n's and the problem will equal 26 which is the answer u want for the 2nd problem 5x=4=x-4 u +4 to the 4 and u get 5x=8=x u subtract the x from 5x and get 4x=8 u divde both sides by 4 and u get x=2 i'm not exactly positive on on this one but i'm pretty sure that's how u do it i hope that helped u
 Functions/29439: I have been working on this problem for two weeks and still have not gotten it right. The problem is x^2+x<12 I have to solve it and then check it to make sure that I have it right. No matter how I've done it, it has been wrong. HELP!1 solutions Answer 16232 by Bb(19)   on 2006-03-06 21:34:18 (Show Source): You can put this solution on YOUR website!ok 1st u simplify the problem 2x^2<12=4x<12 then u divide by 4 on each side and u get x<4 to chek u replace the x with 3 so u get 3^2+3<12 i hope that helps
 Expressions-with-variables/29282: a _ = 0 8 I don't understand this question.1 solutions Answer 16222 by Bb(19)   on 2006-03-06 19:58:44 (Show Source): You can put this solution on YOUR website!when u have a fraction like that it means to divide the top number by the bottom number so in order to find the answer u would do 8*0=0 and 0 would be your answer i hope this helped u
 Radicals/29403: 9^3/2= 1 solutions Answer 16218 by Bb(19)   on 2006-03-06 19:47:54 (Show Source): You can put this solution on YOUR website!to find the answer you would do 9*9*9/2 to find the answer the answer would be 364.5 after u did that i hope that helped
 Quadratic_Equations/29373: Ellen has two more nickels than dimes and three more quarters than nickels. She has \$3.35 in all. 1 solutions Answer 16191 by Bb(19)   on 2006-03-06 16:32:49 (Show Source): You can put this solution on YOUR website!How many coins of each type does she have? to find the answer u randomly find how many quaters u need than take 3 away from that to find how many nickles u need then u - 2 from that to find how many dimes u need the answer is u need 10 quaters, 7 nickles and 5 dimes hope that helps