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# Recent problems solved by 'scott8148'

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 Angles/616754: whats the complement of a 53 angle 1 solutions Answer 387881 by scott8148(6628)   on 2012-05-31 20:19:09 (Show Source): You can put this solution on YOUR website!90 - 53
 Quadratic-relations-and-conic-sections/616755: identify the conic section with the equation x^2 + y^2 - 6x - 4y - 68 = 0 1 solutions Answer 387880 by scott8148(6628)   on 2012-05-31 20:18:31 (Show Source): You can put this solution on YOUR website!x and y both squared, with equal coefficients ___ a circle
 Equations/616753: how do you factor this quadratic equation? i keep trying but its not right. 12x^2+13x-4=0 1 solutions Answer 387879 by scott8148(6628)   on 2012-05-31 20:17:25 (Show Source): You can put this solution on YOUR website!(4x - 1)(3x + 4) = 0
 logarithm/616752: Logx49=2 in exponential form...the x is suppose to be small Solve for the unknown variable: Log3X=5...the 3 is suppose to be small1 solutions Answer 387878 by scott8148(6628)   on 2012-05-31 20:15:42 (Show Source): You can put this solution on YOUR website!x^2 = 49 3^5 = x
 Inverses/616721: This final one completely throws me. Make x the subject. f= p sqrt(g-x) Thank you1 solutions Answer 387877 by scott8148(6628)   on 2012-05-31 20:09:53 (Show Source): You can put this solution on YOUR website!dividing by p ___ f/p = sqrt(g-x) squaring ___ (f/p)^2 = g-x adding x and subtracting (f/p)^2 ___ x = g - (f/p)^2
 Linear-equations/616687: Write an equations of the line containing the given point and perpendicular to the given line. (0,2); 2x+5y=31 solutions Answer 387876 by scott8148(6628)   on 2012-05-31 20:00:47 (Show Source): You can put this solution on YOUR website!swapping the x and y coefficients, and changing one of the signs; changes the slope to the negative reciprocal (perpendicular) 5x - 2y = ? ___ substitute the given point to find the new constant term 5(0) - 2(2) = -4 5x - 2y = 4
 Surface-area/616391: find the volume and surface area of a cube with an edge length of 10 units1 solutions Answer 387660 by scott8148(6628)   on 2012-05-30 19:59:38 (Show Source): You can put this solution on YOUR website!v = e^3 sa = 6 e^2
 Reduction-of-unit-multipliers/616382: the profit of selling x tables is given by p(x)=20000+80x-0.4x^2. how many tables should be made to maximize profits?1 solutions Answer 387659 by scott8148(6628)   on 2012-05-30 19:57:58 (Show Source): You can put this solution on YOUR website!the maximum is the vertex, on the axis of symmetry the equation is ___ x = -b / (2a) ___ from ax^2 + bx + c
 Exponential-and-logarithmic-functions/616378: How do you solve 5^x=3 for x using logs?1 solutions Answer 387658 by scott8148(6628)   on 2012-05-30 19:54:31 (Show Source): You can put this solution on YOUR website!x * log(5) = log(3)
 Mixture_Word_Problems/616344: I have two problem on a quiz due tonight need simalar exaples to help me work my problems. . A dehydrated patient needs a 2.6% saline IV. Unfortunately, the hospital only has bags of 8% and 2% saline solutions. How many liters of each of these solutions should be mixed together to yield 2 liters of the desired concentration? . To buy both a new car and a new house, Tina sought two loans totaling \$318,338. The simple interest rate on the first loan was 2.4%, while the simple interest rate on the second loan was 4.7%. At the end of the first year, Tina paid a combined interest payment of \$14,761.81. What were the amounts of the two loans? please help thanks mia1 solutions Answer 387656 by scott8148(6628)   on 2012-05-30 19:50:37 (Show Source): You can put this solution on YOUR website!(8%)(x) + (2%)(2 - x) = (2.6%)(2) (2.4%)(x) + (4.7%)(318338 - x) = 14761.81
 Rectangles/616334: If a rectangular garden has perimeter of 36ft, and the garden covers the greatest possible area, what should its dimensions be?1 solutions Answer 387655 by scott8148(6628)   on 2012-05-30 19:45:49 (Show Source): You can put this solution on YOUR website!a square is the rectangle with the greatest area for a given perimeter
 Polynomials-and-rational-expressions/615981: factor the trinomial 4n^2-22n-421 solutions Answer 387428 by scott8148(6628)   on 2012-05-29 20:07:55 (Show Source): You can put this solution on YOUR website!(4n + 6)(n - 7)
 Angles/615973: how do you calculate the angles of a kite when 2 angles(B and D) are equal and both equal 114 degrees and one other angle (A)is twice the measure of angle C 1 solutions Answer 387424 by scott8148(6628)   on 2012-05-29 20:06:11 (Show Source): You can put this solution on YOUR website!the sum of the angles of a quadrilateral (like a kite) is 360º 3C = 360 - 2(114)
 Matrices-and-determiminant/615967: We're trying to help our soon with his math homework but we're totally stuck one this problem: A store has a sale on almonds, pecans and pistachios. One lb of almonds, one lb of pecans and one lb of pistachios cost \$12. Two lbs of almonds and three lbs of pecans cost \$16. Three lbs of pecans and two lbs pistachios cost \$24. Find the price of each kind of nut. Thank you in advance for any help.1 solutions Answer 387421 by scott8148(6628)   on 2012-05-29 20:02:44 (Show Source): You can put this solution on YOUR website!x=almond, y=pecan, z=pistachio x + y + z = 12 ___ A 2x + 3y = 16 ___ B 3y + 2z = 24 ___ C eliminating x ___ 2A - B ___ -y + 2z = 8 ___ D eliminating y ___ 3D + C ___ 8z = 48 solve for z, then substitute back to find y and x
 Distributive-associative-commutative-properties/615958: two pumps were required to pump the water out of a submerged area after a hurricane. Pump A,the large of the two pumps can pump the water out in 36 hours,whereas it would take pump B 180 hours. both pumps were working for the first 9 hours until pump A broke. how long did it take pump B to pump out the remaining water?1 solutions Answer 387418 by scott8148(6628)   on 2012-05-29 19:48:03 (Show Source): You can put this solution on YOUR website!in the 9 hrs that it runs, A pumps out 1/4 (9/36) of the water it takes B 135 hr (3/4 * 180) to pump the remaining 3/4; but B has been pumping for 9 hrs, so only 126 hrs to finish
 Coordinate-system/615956: can you please solve this for me? 5x – 7y = -16, 2x + 8y = 261 solutions Answer 387416 by scott8148(6628)   on 2012-05-29 19:43:44 (Show Source): You can put this solution on YOUR website!multiplying the 2nd equation by 5/2 ___ 5x + 20y = 65 subtracting the 1st equation (to eliminate x) ___ 27y = 81 solve for y, then substitute back to find x
 Travel_Word_Problems/615957: 1.) A bacteria culture contains 50 bacteria initially and doubles every hour. a.) find a function that models the number of bacteria after t hours b.) find the number of bacteria after 5 hours completely lost :(1 solutions Answer 387414 by scott8148(6628)   on 2012-05-29 19:39:27 (Show Source): You can put this solution on YOUR website!the number of bacteria is multiplied by two every hour ___ b * 2 * 2 * 2...etc a.)f(t) = 50 * 2^t b.) f(5) = 50 * 2^5 = 50 * 32
 Linear-equations/615939: i need an equation to match this data table x -3 -2 -1 0 1 2 3 y 5 9 13 17 21 25 291 solutions Answer 387395 by scott8148(6628)   on 2012-05-29 18:43:09 (Show Source): You can put this solution on YOUR website!x increases by one while y increases by 4, so the slope (m) is 4 when x is zero, y is 17; so the y-intercept (b) is 17 y = 4x + 17
 Polynomials-and-rational-expressions/615936: x^3+6x^2+3x+181 solutions Answer 387393 by scott8148(6628)   on 2012-05-29 18:40:08 (Show Source): You can put this solution on YOUR website!separating ___ (x^3 + 6x^2) + (3x + 18) factoring ___ x^2 (x + 6) + 3 (x + 6) rearranging ___ (x^2 + 3)(x + 6)
 Equations/615935: please help me it says to solve by using elimination method x + 8y = 14 -3x + 4y = 0 1 solutions Answer 387389 by scott8148(6628)   on 2012-05-29 18:35:38 (Show Source): You can put this solution on YOUR website!multiplying 1st equation by 3 ___ 3x + 24y = 42 adding 2nd equation (to eliminate x) ___ 28y = 42 solve for y, then substitute back to find x
 Rectangles/615886: Ramon is designing a rectangular garden with a width of 8ft. The path that leads diagonally across the garden is 2ft longer than the length of the garden. How long is the path?1 solutions Answer 387375 by scott8148(6628)   on 2012-05-29 17:11:33 (Show Source): You can put this solution on YOUR website!by Pythagoras ___ 8^2 + (p - 2)^2 = p^2
 Triangles/615869: The hypotenuse of a right triangle is nine more than the shortest leg. The longer leg is only one more than the shortest leg. Find the length of the hypotenuse of the triangle. 1 solutions Answer 387349 by scott8148(6628)   on 2012-05-29 15:32:00 (Show Source): You can put this solution on YOUR website!(h - 9)^2 + (h - 8)^2 = h^2 h^2 - 18h + 81 + h^2 - 16h + 64 = h^2 h^2 - 34h + 145 = 0 factoring ___ (h - 5)(h - 29) = 0
 Triangles/615868: the altitude to the hypotenuse of a right triangle divides the hypotenuse into segments 25 cm and 30 cm long. how long is the altitude? 1 solutions Answer 387346 by scott8148(6628)   on 2012-05-29 15:25:29 (Show Source): You can put this solution on YOUR website!25 / a = a / 30
 Age_Word_Problems/615867: my mum was 27 when i was born, 8 years ago she was twice as old as i shall be in 5 years time..how old am i now?1 solutions Answer 387345 by scott8148(6628)   on 2012-05-29 15:22:37 (Show Source): You can put this solution on YOUR website!m = i + 27 m - 8 = 2(i + 5) substituting ___ (i + 27) - 8 = 2i + 10 ___ i + 19 = 2i + 10
 Geometry_Word_Problems/615864: A rectangular garden measures by 33ft by 66ft . Surrounding (and bordering) the garden is a path 2ft wide. Find the area of this path. 1 solutions Answer 387342 by scott8148(6628)   on 2012-05-29 15:16:31 (Show Source): You can put this solution on YOUR website![(66 + 4)(33 + 4)] - (66 * 33)
 expressions/615863: Solve for x. 2x^2 - 7x = 41 solutions Answer 387340 by scott8148(6628)   on 2012-05-29 15:14:08 (Show Source): You can put this solution on YOUR website!2x^2 - 7x - 4 = 0 factoring ___ (2x + 1)(x - 4) = 0 2x - 1 = 0 x - 4 = 0
 Systems-of-equations/615860: How do I solve this system? x²+y²=10 xy=3 1 solutions Answer 387338 by scott8148(6628)   on 2012-05-29 15:10:40 (Show Source): You can put this solution on YOUR website!FOILing (x + y)^2 ___ x^2 + 2xy + y^2 substituting ___ (x + y)^2 = 10 + 2(3) = 16 taking square root ___ x + y = ± 4 xy = 3 ___ x = 3/y x + y = 4 ___ substituting ___ 3/y + y = 4 ___ 3 + y^2 = 4y ___ y^2 - 4y + 3 = 0 ___ (y - 3)(y - 1) = 0 ___ y = 3 AND 1 ___ solutions are (1,3) and (3,1) x + y = -4 ___ same technique ___ solutions are (-1,-3) and (-3,-1)
 Numbers_Word_Problems/615859: I do not know where to start with this problem: A compass and a ruler together cost \$4. The compass costs .90 more than the ruler. How much does the compass cost? I am 53 and have never understood how to do word problems. I can solve the equations but cannot come up with the equation itself.1 solutions Answer 387336 by scott8148(6628)   on 2012-05-29 14:51:47 (Show Source): You can put this solution on YOUR website!"A compass" ___ c "and a ruler" ___ r "together cost \$4" ___ c + r = \$4 "The compass costs .90 more than the ruler" ___ c = r + \$.90
 expressions/615835: nine more than a numberr1 solutions Answer 387333 by scott8148(6628)   on 2012-05-29 14:43:14 (Show Source): You can put this solution on YOUR website!n + 9
 Money_Word_Problems/615831: Roberto invested some money at 8%, and then invested \$2000 more than twice this amount at 12%. His total annual income from the two investments was \$4720. How much was invested at 12%?1 solutions Answer 387332 by scott8148(6628)   on 2012-05-29 14:42:42 (Show Source): You can put this solution on YOUR website!(8%)(x) + (12%)(2x + 2000) = 4720
 Mixture_Word_Problems/615814: A yogurt company blends regular yogurt that is 4% fat with its no-fat yogurt to obtain low-fat yogurt that is 1% fat. How many pounds of non-fat yogurt must be mixed to obtain 60 pounds of low-fat yogurt?1 solutions Answer 387317 by scott8148(6628)   on 2012-05-29 12:43:13 (Show Source): You can put this solution on YOUR website!(0%)(x) + (4%)(60 - x) = (1%)(60)