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Recent problems solved by 'user_dude2008'

user_dude2008 answered: 1858 problems
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Points-lines-and-rays/363362: The equation c=$.05m+ $ 4.95 represents the cost (C) of a long didtance telephone call of m minutes. what is the slope of the line? what does the slope represent in this situation? what is the y-intercept (C-intercept)? what does the y-intercept represent in this situation? 1 solutions Answer 259071 by user_dude2008(1861)   on 2010-10-28 20:47:16 (Show Source): You can put this solution on YOUR website! slope m = 0.05 what does the slope represent in this situation? variable cost y intercept (0,4.95) what does the y-intercept represent in this situation? fixed cost

test/363364: 1 solutions Answer 259070 by user_dude2008(1861)   on 2010-10-28 20:46:27 (Show Source): You can put this solution on YOUR website! ?????

expressions/359454: 3+y for y=7 1 solutions Answer 256524 by user_dude2008(1861)   on 2010-10-21 01:09:21 (Show Source): You can put this solution on YOUR website! 3+y=3+7=10

Expressions-with-variables/359522: solve for t: 5t + 4 = 3s 1 solutions Answer 256523 by user_dude2008(1861)   on 2010-10-21 01:05:57 (Show Source): You can put this solution on YOUR website! 5t + 4 = 3s 5t = 3s-4

Rational-functions/359479: I have to write the rate as a unit rate...22 ounces for 4 servings. I did 22/4 and got 5 reminder 2 or if I add a zero to the 22, I get 5.5. How do I write it as a unit rate? 1 solutions Answer 256522 by user_dude2008(1861)   on 2010-10-21 01:05:04 (Show Source): You can put this solution on YOUR website! 22/4 = 11/2 = 5.5 22 ounces for 4 servings -----> 5.5 oz per serving

Functions/359151: If a linear function f satisfies the conditions : f ( -3 ) = - 2 and f ( 3 ) = 16 , find f ( x ). 1 solutions Answer 256309 by user_dude2008(1861)   on 2010-10-20 13:53:43 (Show Source): You can put this solution on YOUR website! m=(y2-y1)/(x2-x1)=(16-(-2))/(3-(-3))=18/6=3 m=3 x1=-3 y1=-2 y-y1=m(x-x1) y-(-2)=3(x-(-3)) y+2=3(x+3) y=3x+9-2 y=3x+7 Answer: f(x) = 3x+7

Graphs/358692: Find an equation of the line having the given slope and containing the given point. Express your answer in the form x=a, y=b, or y=mx+b m=-2,(8,0) The equation of the line is y=_________ Thank you. 1 solutions Answer 255993 by user_dude2008(1861)   on 2010-10-19 17:43:10 (Show Source): You can put this solution on YOUR website! y-y1=m(x-x1) y-0=-2(x-8) y=-2x+16

Polynomials-and-rational-expressions/358640: please help me someone multiply (-2x)^2 (3x^7)^2 1 solutions Answer 255991 by user_dude2008(1861)   on 2010-10-19 17:34:24 (Show Source): You can put this solution on YOUR website! (-2x)^2 (3x^7)^2 = (4x^2)(9x^14) = 36x^16

Radicals/358633: Please help me i am really lost Simplify ^3sqrt(-1/125) "simplify type a fraction or integer" 1 solutions Answer 255989 by user_dude2008(1861)   on 2010-10-19 17:33:15 (Show Source): You can put this solution on YOUR website!

Functions/358386: Hi, here is my question. I need to find the domain of log (12-3x) and write it in interval notation. Can you help me out? 1 solutions Answer 255765 by user_dude2008(1861)   on 2010-10-19 01:16:58 (Show Source): You can put this solution on YOUR website! 12-3x>0 12>3x 4>x x<4 Domain:

Travel_Word_Problems/358371: start time:1:35 p.m. end time:? Elapsed time:5 hours and 40 minutes would that mean end time is:7:15 p.m. ? 1 solutions Answer 255746 by user_dude2008(1861)   on 2010-10-18 23:21:56 (Show Source): You can put this solution on YOUR website! 1:35 +5:40 ------ 6:75 75 min = 1 hr 15 min ---> 6 + 1 hr 15 min = 7:15

Equations/358330: You lose your electronic tag that you use to pay tolls on the highway in your city. It costs you $24 to replace the tag. The cost of one toll when you don't use the tag is $3. The cost of the same toll when you do use the tag is $1.50. How many times will you have to use the tag to pay for the tolls in order for the total cost to be the same as not using the tag? 1 solutions Answer 255718 by user_dude2008(1861)   on 2010-10-18 22:05:21 (Show Source): You can put this solution on YOUR website! 3x=1.5x+24 3x-1.5x=24 1.5x=24 x=16 Answer: 16 times

logarithm/358328: help me solve 5^x = 7*3^x the answer the teacher gives is x = log(7)/log(5/2) 1 solutions Answer 255714 by user_dude2008(1861)   on 2010-10-18 21:58:03 (Show Source): You can put this solution on YOUR website!

Angles/358327: what is the measure and equation of an angle if its measure is equal to that of its supplement? 1 solutions Answer 255713 by user_dude2008(1861)   on 2010-10-18 21:55:09 (Show Source): You can put this solution on YOUR website! x+x=180 2x=180 x=90

Linear-systems/358322: show all work 14x-3=10x+1 1 solutions Answer 255710 by user_dude2008(1861)   on 2010-10-18 21:46:45 (Show Source): You can put this solution on YOUR website! 14x-3=10x+1 14x-10x=1+3 4x=4 x=4/4 x=1

Signed-numbers/358242: Insert parentheses to make each ststaement true. 48/4+8-4+2=2 1 solutions Answer 255709 by user_dude2008(1861)   on 2010-10-18 21:46:01 (Show Source): You can put this solution on YOUR website! 48/(4+8)-4+2=2

absolute-value/358320: please help with the problem : the absolute value of (b-5) +6 = 14 1 solutions Answer 255708 by user_dude2008(1861)   on 2010-10-18 21:44:54 (Show Source): You can put this solution on YOUR website! |b-5|+6 = 14 |b-5| = 8 b-5=8 or b-5=-8 b=13 or b=-3

Expressions-with-variables/358318: The perimeter of the rectangle below is 184 units. Find the length of side CD . Side AD = 4z-1 Side AB = 5z+3 D-----------C [------------] [------------] [------------] A-----------B 1 solutions Answer 255706 by user_dude2008(1861)   on 2010-10-18 21:40:51 (Show Source): You can put this solution on YOUR website! 2AD+2AB=P 2(4z-1)+2(5z+3)=184 8z-2+10z+6=184 18z+4=184 18z=184-4 18z=180 z=10 CD=5z+3=5(10)+3=50+3=53

Exponents/358307: rewrite with a rational exponent ^6sqrt(21) 1 solutions Answer 255703 by user_dude2008(1861)   on 2010-10-18 21:39:16 (Show Source): You can put this solution on YOUR website!

Polynomials-and-rational-expressions/357895: Add (3s^4-2s^3+4s^2+15s-10) + (s^5+7s^3+6s^2-4s+6) + (-6s^4+s^2-7s-8) 1 solutions Answer 255551 by user_dude2008(1861)   on 2010-10-18 15:11:56 (Show Source): You can put this solution on YOUR website! (3s^4-2s^3+4s^2+15s-10) + (s^5+7s^3+6s^2-4s+6) + (-6s^4+s^2-7s-8) = s^5-3s^4+5s^3+11s^2+4s-12

test/357574: Can anyone please help me how to do this because i am confused with this problem.. Find three consecutive integers such that the sum of the first and third is 84. please show me the work thanks 1 solutions Answer 255291 by user_dude2008(1861)   on 2010-10-17 18:13:43 (Show Source): You can put this solution on YOUR website! x+(x+2)=84 2x+2=84 2x=84-2 2x=82 x=41 numbers are 41, 42, 43

Functions/357488: Let f(x)= absolute value of x^2+1. Find f(x+4) 1 solutions Answer 255256 by user_dude2008(1861)   on 2010-10-17 15:40:54 (Show Source): You can put this solution on YOUR website! f(x+4)=|(x+4)^2+1|=|x^2+8x+16+1|=|x^2+8x+17| f(x+4)=|x^2+8x+17|

Quadratic_Equations/357478: I have been working on this all week and I just cannot get it. I know this is short notice but it is due with in the next 12 hours PLEASE HELP! A plasma TV company determines that its total profit on the production and sale of x TVs is given by: P(x)= -x^2+812x-9600 the question that i am stuck on are as follows, and i have to show the work: 1. Find the solutions and explain what these solutions represent. 2. How many TV’s must be produced to reach a minimum or maximum profit? 3.What is this minimum or maximum profit? 4.What is the vertex of this graph? How is this point related to your answers from e and f? I also have to graph it but i think i can do that if i have these answers thank you so much in advance. 1 solutions Answer 255255 by user_dude2008(1861)   on 2010-10-17 15:39:43 (Show Source): You can put this solution on YOUR website! 1) Solutions: x = 12, x = 800 2) 406 tvs must be produced 3) max profit = $155236 4) vertex (406,155236) x coordinate from 2) y coordinate from 3) Graph

Graphs/357425: what is the y intercept for y=-2/3x-12 1 solutions Answer 255246 by user_dude2008(1861)   on 2010-10-17 14:04:56 (Show Source): You can put this solution on YOUR website! y-intercept is (0,-12)

Permutations/357429: Using the numbers 1 through 13, how many different combinations of four numbers can I have? 1 solutions Answer 255245 by user_dude2008(1861)   on 2010-10-17 14:04:13 (Show Source): You can put this solution on YOUR website!

Functions/357428: Hey, for each pair of revenue and cost functions, determine i) the profit function ii) the value of x that maximizes profit a) R(x)=-x^2+24x, C(x)=12x+28 i got part i) it was, -x^2+12x+28 but i have no idea how to do part ii) thanks 1 solutions Answer 255243 by user_dude2008(1861)   on 2010-10-17 14:00:01 (Show Source): You can put this solution on YOUR website! i) P=R-C = -x^2+24x-(12x+28) = -x^2+24x-12x-28 = -x^2+12x-28 ii) x=-b/2a = -12/2(-1) = 6 Answer x=6

Quadratic_Equations/357223: find the x and y intercepts f(x)= -x^2+2x+24 The x coordinates of the intercepts are?? The y intercept is (0,?) 1 solutions Answer 255133 by user_dude2008(1861)   on 2010-10-16 22:29:38 (Show Source): You can put this solution on YOUR website! x-intercepts (6,0) and (-4,0) y-intercept (0,24)

Quadratic_Equations/357234: Find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function, and graph the function. f(x) = -x^2+6x+1 1) The vertex is ?? "ordered pair" 2) the equation of the line of symmetry is x= ?? 3) the maximum/,mimimum of f(x) is ??? 4) The value of f(3)=10 is minimum or maximum?? Could you please show me the graph?? 1 solutions Answer 255129 by user_dude2008(1861)   on 2010-10-16 22:17:56 (Show Source): You can put this solution on YOUR website! 1) Vertex is (3,10) 2) line of symmetry: x=3 3) max is f(x)=10 4) f(3)=10 is a maximum Graph

Numbers_Word_Problems/357131: Separate 150 into two parts such that four times the larger exceeds five times the smaller by sixty. 1 solutions Answer 255039 by user_dude2008(1861)   on 2010-10-16 16:13:56 (Show Source): You can put this solution on YOUR website! x+y=150 4x=5y+60 4x+4y=600 5y+60+4y=600 9y=540 y=60 x+y=150 x+60=150 x=90

Finance/357135: A union charges monthly dues of $6.00 plus $0.15 for each hour worked during the month. A union member's dues for March were $31.80. Write an equation to find the number of hours, x, the union member worked during the month of March. How many hours did the union member work during the month of March? x = h? 1 solutions Answer 255038 by user_dude2008(1861)   on 2010-10-16 16:11:39 (Show Source): You can put this solution on YOUR website! 0.15x+6=31.80 0.15x=31.80-6 0.15x=25.80 x=25.80/0.15 x=172 Answer: 172 hours

Complex_Numbers/357132: find an expression in simplest form for a polynomial of third degree with real coefficients having roots of 3 and 1-2i 1 solutions Answer 255037 by user_dude2008(1861)   on 2010-10-16 15:58:31 (Show Source): You can put this solution on YOUR website! (x-3)(x-(1-2i))(x-(1+2i))=0 (x-3)(x-1+2i)(x-1-2i)=0 (x-3)((x-1)+2i)((x-1)-2i)=0 (x-3)((x-1)^2+4)=0 x(x-1)^2+4x-3(x-1)^2-12=0 x(x^2-2x+1)+4x-3(x^2-2x+1)-12=0 x^3-2x^2+x+4x-3x^2+6x-3-12=0 x^3-5x^2+11x-15=0 Answer: x^3-5x^2+11x-15