Henry2,

Newest questions and responses by Henry2,
  1. algebra

    Given: r1(3, 0), r2(7, 0). y-int.(0, -21). V(5, 4). Y = a(x-h)^2 + k. a(3 - 5)^2 + 4 = 0, 4a = -4, a = -1. Vertex form: Y = -1(x - 5)^2 + 4. Y = -1(x^2 - 10x + 25) + 4, Y = -x^2 + 10x - 21(Standard form).

    posted on March 20, 2019
  2. Math

    They gave you the Eq and the dimensions; what do you need?

    posted on March 19, 2019
  3. math

    As = 2*(W*h) + 2*(L*h) + 2*(L*W). As = 2*(5*7) + 2*(14*7) + 2*(14*5) =

    posted on March 19, 2019
  4. Physics

    16t^2 = 10,000. t = 25 s. d = 300mi/h * (25/3600)h =

    posted on March 19, 2019
  5. Math

    Note: The given x-int. satisfy my Eq., but my y-int. is -9.2 instead of 1.5.

    posted on March 19, 2019
  6. Math

    Y = Ax^2 + Bx + C. C = -4.6 * 2 = -9.2. B = -4.6 + 2 = -2.6. h = (-2 + 4.6)/2 = 1.3. h = -B/2A = 1.3. 2.6/2A = 1.3, A = 1. Eq: Y = x^2 - 2.6x - 9.2.

    posted on March 19, 2019
  7. physics

    M*g = 1800 * 9.8 = 17,640 N. = Wt. of vehicle = Normal force, Fn. u*Fn = 0.7 * 17,640 = 12,348 N. = Force of kinetic friction. -uFn = M * a. -12,348 = 1800 * a. a = -686 m/s^2. V^2 = Vo^2 + 2a*d = 0. 25^2 + (-13.72)d = 0, d = 45.6 m.

    posted on March 18, 2019
  8. Math

    360-316 = 44o W. of N. Cos44 = h/505. h = 363 km. Cos A = 363/770. A = 62o W. of S. = 242o CW from +y-axis = Bearing(Heading) from Elgin to Canton.

    posted on March 17, 2019
  9. Math

    All angles are measured CW from +y-axis. d = 20km[205o] - 30km[60o]. X = 20*sin205 - 30*sin60 = -34.43 km. Y = 20*Cos205 - 30*Cos60 = -33.13 km. d = sqrt(X^2 + Y^2).

    posted on March 16, 2019
  10. Math

    V = Vo - Vo*r*T = $42,000. 150,000 - 150,000*r*9 = 42,000. 1 - 9r = 0.28, 9r = 0.72, r = 0.08/yr. = Annual depreciation rate. V = Vo - Vo*r*T. V = 150,000 - 150,000*0.08*4 = $102,000.

    posted on March 15, 2019
  11. math

    b. (8, -98) is NOT a solution. (8, -99) IS a solution.

    posted on March 15, 2019
  12. Math

    sqrt(-50x^2y^2) = sqrt(25*2*(-1)x^2y^2) = 5i(xy)sqrt(2). Note: sqrt 25 = 5, sqrt (-1) = i, 2 remains under radical.

    posted on March 15, 2019
  13. math

    Alex has X jelly beans. x - 2x/5 = 3x/5 remaining. 1/3 * 3x/5 = 3x/15 = x/5 remaining. x/5 = 51. X = 255. Martha ate 2/3 * 3x/5 = 2/3 * (3*255)/5 = 102 Jelly beans. 102/255 = 34/85 = 2/5 of original jelly beans.

    posted on March 14, 2019
  14. Math

    Troyan is X yrs. old. Tyshai is 7x yrs. old. 5 yrs. Later: (x+5) + (7x+5) = 98. X =

    posted on March 14, 2019
  15. Math

    P*r*t = I. 250 * r * 3 = 30. 750r = 30, r = 0.04 = 4%.

    posted on March 14, 2019
  16. math

    r = d/t = 792mi/125min. = 6.336 mi/min. d = r*t = 6.336 * 30 =

    posted on March 14, 2019
  17. Maths

    B = 180 - (35+65) = 80o. AB/sin65 = 6/sin80. AB = 6*sin65/sin80 = 5.52 cm BC/sin35 = 6/sin80. BC = ?

    posted on March 13, 2019
  18. Math

    6/(2/3) = 6 * 3/2 = 18/2 = 9 Loaves.

    posted on March 12, 2019
  19. Math

    5/6/(1/3) = 5/6 * 3/1 = 15/6 = 2 3/6 = 2 1/2 servings. A half serving = 1/2 * 1/3 = 1/6 cup.

    posted on March 11, 2019
  20. Math

    Parker Music: $40/h Joelle Music: $25/0.5h = $50./h. 50 - 40 = $10 more per h.

    posted on March 11, 2019
  21. Math

    3/10 pizza for each friend.

    posted on March 11, 2019
  22. math

    43/10 - n = 4. n = 43/10 - 4 = 43/10 - 40/10 = 3/10.

    posted on March 10, 2019
  23. Maths

    |2x| > |2x-5| + |x+1|. 2x > 2x-5 + x+1. 2x -2x - x > -4, -x > -4, X < 4. Reversed inequality sign after dividing by -1.

    posted on March 10, 2019
  24. Math

    2L = 2,000 mL. 2000mL/250mL = 8 glasses.

    posted on March 10, 2019
  25. Math

    2cups * 8oz/cup = 16 oz. = 16 oz./bottle. 16oz./bottle * 5bottles = 80 oz. of juice. 1qt. = 32 oz. of juice.

    posted on March 10, 2019
  26. Math

    Function Q: (4, 0), m = 1/4. Y = mx + b. 0 = (1/4)4 + b, b = -1 = y-int. Eq: Y = (1/4)x - 1. Function R: (x, y): (-4, 14), (3, 0), (5, -4). m = (0-14)/(3-(-4)) = -14/7 = --2. Y = mx + b, 14 = -2*(-4) + b. b = 6 = y-int. Eq: Y = -2x + 6.

    posted on March 9, 2019
  27. Maths

    sin40 = d/200. d = 200*sin40.

    posted on March 9, 2019
  28. algebra

    sqrt a^4 = a^2. Sqrt 169 = 13. solution: (a^2 - 13)^2. check: (a^2 - 13)^2 = a^4 - 26a^2 + 169.

    posted on March 9, 2019
  29. math

    31 - 21 = 21 people to sat on blankets. 21people * 1blanket/3people = 21 * 1/3 = 7 blankets needed.

    posted on March 9, 2019
  30. Algebra

    F(x) = 4x^2 - 12x + 13. h = -B/2A = 12/8 = 3/2. K = 4(3/2)^2 - 12(3/2) + 13 = 9 - 18 + 13 = 4. Vertex Form: F(x) = a(x-h)^2 + k. = 4(x - 3/2)^2 + 4.

    posted on March 8, 2019
  31. Math

    Yes, who is Barbara's competitor? How fast does he/she walk?

    posted on March 8, 2019
  32. Math

    water/flour = 6/4 = 3/2. a. 3/2 = W/6. 2W = 18, W = 9 cups of water. b. 3/2 = 2/F. 3F = 4, F = 4/3 = 1 1/3 cups of flour.

    posted on March 8, 2019
  33. Math

    sin A = 1/2 = Y/r. Cos A = sqrt3/2 = X/r. x = sqrt 3, Y = 1, r = 2. Tan A = Y/X = 1/sqrt3. Cot A = 1/Tan A = sqrt3/1 = sqrt 3. sec A = 1/Cos A = 2/sqrt 3. csc A = 1/sin A = 2/1 = 2.

    posted on March 8, 2019
  34. mATH

    (-3, 16), (15, -8). X = (15-(-3)) = 18. Y = (-8-16) = -24. d = sqrt(X^2 + Y^2) =

    posted on March 8, 2019
  35. Math

    17ft + (6/12)ft = 17 + 1/2 = 17.5 Ft.

    posted on March 8, 2019
  36. math

    31 - 10 = 21 People to sit on blankets. Can you finish it?

    posted on March 8, 2019
  37. Math

    You are welcome!

    posted on March 8, 2019
  38. Math

    You are welcome!

    posted on March 8, 2019
  39. Math

    Eq1: 2x - 5y + 3z = 8. Eq3: 2x + 6y + 4z = -6.(multiplied by 2). Diff. = -11y - z = 14. Eq2: 3x - y + 4z = 7. Eq3: 3x + 9y + 6z = -9.(been multiplied by 3). Diff. = -10y - 2z = 16. -22y - 2z = 28.(been multiplied by 2). -10y - 2z = 16. Diff. = -12y = 12, Y

    posted on March 7, 2019
  40. Math

    Multiplying Eq2 and Eq3 by 3 won't help, because it does not eliminate a variable. Yes, you can use Eq1 and Eq3 and then Eq2 and Eq3. Eliminate X in each case. .

    posted on March 7, 2019
  41. Math

    -45/6 + (-13/6) = -58/6 = -29/3.

    posted on March 7, 2019
  42. Math

    b + 7/8 >= 1/6. b >= 1/6 - 7/8, b >= 4/24 - 21/24, b >= -17/24. Do you mean 40 < (5/8)k ? If so: 40 < 5k/8. Multiply both sides by 8: 320 < 5k, 320/5 < 5k/5, 64 < k.

    posted on March 6, 2019
  43. Math

    Net Loss = -26 - 11 - 9 + 13 = $33.

    posted on March 6, 2019
  44. Math

    Change = (22-(-13))/(10-3) = 35/7 = 5oF.

    posted on March 6, 2019
  45. Geometry

    We cannot help you without the required information. Please READ your post.

    posted on March 6, 2019
  46. Physics HELP

    I = V/Rm = 5.70/95 = 0.06A. r = V/I = (6-5.7)/0.06 = 0.30/0.06 = 5. Ohms.

    posted on March 6, 2019
  47. math

    -13V = 195. V = 195/-13 = -15. Check: (-15) * (-13) = +195.

    posted on March 6, 2019
  48. Geometry

    Tan110 = d/X. d = x*Tan110. . Tan150 = d/(x-75). d = (x-75)*Tan150. x*Tan110 = (x-75)*Tan150. x = (x-75)*Tan150/Tan110, x = (x-75)*0.21, x = 0.21x - 15.75, X = -20 Ft. d = x*Tan110 = -20*Tan110 = 55 Ft.

    posted on March 6, 2019
  49. Math 6th grade

    The last choice is my answer.

    posted on March 5, 2019
  50. Electricity

    kW =1500/1000 = 1.5. kWh = 1.5 * 5 = 7.5. Cost = 7.5 * 10 = 75 Cents.

    posted on March 5, 2019
  51. Electricity

    I = E/7R = 15/7R. V1 = I*R = 15/7R * R = 15/7 = 2.14 Volts. V2 = I*2R = 15/7R * 2R = 30/7 = 4.29 Volts. V3 = I*4R = 15/7R * 4R = 60/7 = 8.57 Volts.

    posted on March 5, 2019
  52. Electricity

    Given: E = 130 Volts. 100v. is too low for the given circuit values. R1 = 3k. R2 = 4k. R3 = 1k, P3 = 200mW. R4 = ? a. P3 = V3^2/R3 = 200. V3^2/1 = 200, V3 = 14.14 volts. I3 = V3/R3 = 14.14/1=14.14 mA = I1 = I2 = I4. b. V4 = E - I(R1+R2+R3) = 130 -

    posted on March 5, 2019
  53. Electricity

    2. radius = 2 mm = 0.002 meters. A = pi*r^2 = 3.14 * (2*10^-3)^2 = 1.26*10^-5 m^2. R = p*L/A = 2.8*10^-8 * 25/1.26*10^-5 = 0.056 Ohms.

    posted on March 5, 2019
  54. Physics

    1. Mass = 10cm/5cm * 5kg = 2. k = 35/0.25cm = 3. M*g = 2 * 9.8 = 19.6 N. applied. Spring A: Disp. = 19.6N * 1m/5N = 3.92 m. M*g = 10 * 9.8 = 98 N. applied. Spring B: Disp. = 98N * 1m/9N = 10.9 m.

    posted on March 4, 2019
  55. Math

    Y = 4x^2 = 4*(-2)^2 = 4 * 4 = 16. (-2, 16). My answer is A.

    posted on March 4, 2019
  56. Algebra

    7. Add 4 to each side and solve for h. 8. P = $245/35 = 9. Do you mean : 8*2 + 9(12/3x^2) - 7.

    posted on March 4, 2019
  57. math

    Yes,

    posted on March 4, 2019
  58. math

    -13v = 195. V = -15. My answer is D.

    posted on March 4, 2019
  59. math

    Y = 4(x+5)(x-2). = 4(x^2-2x+5x-10), = 4(x^2+3x-10), Y = 4x^2+12x-40. Vertex form: a(x-h)*2 + k. a = 4. h = -B/2A = -12/8 = -3/2. K = 4(-3/2)^2 + 12(-3/2) - 40 = 9 - 18 - 40 = -49. Y = 4(x+3/2)^2 -49. You are correct!! Excellent job!

    posted on March 4, 2019
  60. Math

    r = X km/h in the mornings. r = x-1 km/h in the evening. t1 + t2 = 5 .4 h. x * t1 = 12. t1 = 12/x. (x-1) * t2 = 12. t2 = 12/(x-1). t1 + t2 = 5.4. 12/x + 12/(x-1) = 5.4. 12(x-1) + 12x = 5.4x(x-1), 12x - 12 +12x = 5.4x^2 - 5.4x, 5.4x^2 - 24x - 5.4x + 12 = 0.

    posted on March 3, 2019
  61. physics

    1. V = Vo + g*Tr = 0., 48 + (-32)Tr = 0, Tr36 + = 1.5 s. = Rise time. 2. V^2 = Vo^2 + 2g*h = 0. 48^2 + (-64)h = 0, h = 36 ft. 3. h = 0.5g*Tf^2 = 36 + 160. 16*Tf^2 = 196, Tf = 3.5 s. = Fall time. Tr + Tf = 1.5 + 3.5 = 5.0 s. = Time in air. 4. V = Vo + g*Tf

    posted on March 3, 2019
  62. Math

    All angles are measured CW from the +y-axis. P = 0o. Q = 90o.

    posted on March 3, 2019
  63. math

    All angles are measured CW from +y-axis. a. cos45 = h/200. h = 141.4 km. sin45 = d1/200. d1 = 141.4 km. Tan60 = d2/141.4. d2 = 245 km. XZ = d1 + d2 = 141.4 + 245 = 386 km. b. YZ^2 = d2^2 + h^2 = 245^2 + 141.4^2 = 80,019, YZ = 283 km[120o] CW. b.

    posted on March 3, 2019
  64. MATH

    football = 0.38 * 500 = 190 students. basketball = 0.27 * 500 = 135 students. 190 - 135 =

    posted on March 2, 2019
  65. Math

    Vo = 25ft./s[Ao]. Xo = 25*cosA. Yo = 25*sinA. Y^2 = Yo^2 + 2g*h = 0. Yo^2 +(- 64)*4.7 = 0, Yo = 17.3 ft/s. = vert. component of initial velocity. a. Yo = 25*sinA = 17.3 ft/s. b. A = 43.8o = angle of her launch. h = Yo*t + 0.5g*t^2 = 17.3*0.5 + (-16)*0.5^2

    posted on March 1, 2019
  66. Math

    See post: 3-1-19, 1:28PM.

    posted on March 1, 2019
  67. Math

    P1(-8, -4), P2(-4, -3). m = (-3-(-4))/(-4-(-8)) = 1/4. Y = mx + b. -4 = (1/4)*(-8) +b, b = -2. = Y-int. Eq: Y = (1/4)x - 2. 0 = (1/4)x - 2. X = 8 = x-int.

    posted on March 1, 2019
  68. math

    has 2 Lbs. of flour. 2/5 for pizza. 3/10*3/5 = 9/50 for bread. 7/10*3/5 = 21/50 remaining. Weight = 21/50 * 2 = 42/50 = 0.84 Lbs.

    posted on February 28, 2019
  69. Math repost for Will

    Total distance = X meters. swims x/4 meters. cycles 3/5*3x/4 meters = 9x/20 meters. runs 2/5*3x/4 = 6x/20 = 3600 meters. 6x/20 = 3600. X = 12,000 meters.

    posted on February 28, 2019
  70. math

    2/5 + 1/2 = 4/10 + 5/10 = 9/10 of his time. 1 - 9/10 = 10/10 - 9/10 = 1/10 of his time talking with friends. T = 1/10 * 6 = 0.6 h = 36 min. talking with friends.

    posted on February 28, 2019
  71. Math

    As = (W*h)*2 + (L*h)*2 + (L*W)*2 = surface area As = (8*2)*2 + (12*2)*2 + (12*8)*2 =

    posted on February 28, 2019
  72. math help

    Y = x - 3. Y = 2 - 3 = -1. So the answer is C.

    posted on February 27, 2019
  73. physics

    V^2 = Vo^2 + 2g*h = 0. Vo^2 + (-19.6)2.222*10^6 = 0, Vo^2 = 43.55*10^6, Vo = 6,599.3 m/s.

    posted on February 27, 2019
  74. physics

    F = 1625N/m * 0.121m = 196.6 N. Work = F * d = 196.6 * 0.121 = 23.8 Joules.

    posted on February 27, 2019
  75. physics

    M*g = 31 * 9.8 = 303.8 N. = Wt. of block. h = 24 * sin30 = 12 m. KE + F*d = PE. 3645.6 + F*d = 303.8 * 12 = 3645.6, F*d = 0. Therefore, there is no friction and no work done by friction.

    posted on February 27, 2019
  76. physics

    M*g = 1.11 * 9.8 = 10.9 N. = Wt. of block. Fp = 10.9*sin 28 = 5.1 N. = Force parallel to incline. Fn = 10.9*cos28 = 9.6 N. = Normal force. u*Fn = Force of kinetic friction Fp - u*Fn = M*a. a = 0(constant velocity). 5.1 - u*Fn = 1.11*0, u*Fn = 5.1 N. =

    posted on February 27, 2019
  77. Math

    5/12 * 4/12 = 5/12 * 1/3 = 5/36.

    posted on February 27, 2019
  78. math

    a/d = 7/13. a/130 = 7/13, a = 70. c/a = 5/14. c/70 = 5/14. c = 25 students in cooking club.

    posted on February 27, 2019
  79. Math

    5/12 * 4/12 =

    posted on February 27, 2019
  80. Math

    sqrt(2x) + 3 + 6 = 0. sqrt(2x) = -9, 2x =(-9)^2 = 81, X = 40.5. Check: sqrt(2*40.5) +3 +6 = 0.). sqrt(81) + 3 + 6 = 0, -9 + 9 = 0. Note: The sq. root of 81 = +9 or (-9). I chose (-9), because it satisfies the Eq. If these operations are legal, we have one

    posted on February 26, 2019
  81. Math

    As = (h*W)2 + (L*W)2 + (L*h)2. As = (8*14)2 + (10*14)2 + (10*8)2 =

    posted on February 26, 2019
  82. Math

    N25E. = 25o E. of N. opposite = S25W. = 25o W. of S.

    posted on February 26, 2019
  83. math

    cost = $X before tax and tip. x + 0.08x + 0.2(x+0.08x) = 54.32. 1.08x + 0.216x = 54.32, X = $41.91. The answer is D.

    posted on February 26, 2019
  84. math

    (8, 3), (x, y), m = 5. m = (y-3)/(x-8) = 5. cross-multiply: y-3 = 5(x-8).

    posted on February 26, 2019
  85. Math

    50km/4Liters = 12.5 km/Liter. d = 12.5km/Liter * 20Liters =

    posted on February 25, 2019
  86. Math

    Y = -3x^2 + 12x + 15. Vertex form: Y = a(x-h)^2 + k. a = -3. h = -B/2A = -12/-6 = 2. k = -3*2^2 + 12*2 + 15 = 27.

    posted on February 25, 2019
  87. Algebra 2

    (0, 3), m = 4. Y = mx + b. 3 = 4*0 + b, b = 3. Eq: Y = 4x + 3.

    posted on February 25, 2019
  88. Algebra 2

    (4, 5), m = 2. Y = mx + b. 5 = 2*4 + b, b = -3. Eq: Y = 2x - 3.

    posted on February 25, 2019
  89. Algebra 2

    (4, 5), m = -1/2. Y = mx + b. 5 = (-1/2)4 + b, b = 7. Eq: Y = (-1/2)x + 7.

    posted on February 25, 2019
  90. Algebra 2

    F(x)-g(x) = x^2 + 2x - 6 - (x + 5) = x^2 + x - 11. Use Quad. Formula: X = 2.85, and -3.85.

    posted on February 25, 2019
  91. Math

    Correction: a. d = -99 - 14i = 100 km. b. A = 82o W. of S. = 262o CW from +y-axis.

    posted on February 24, 2019
  92. maths

    a. d = 80km[225] - 60km[135o]. X = 80*sin225 - 60*sin135 = -99 km. Y = 80*Cos225 - 60*Cos135 = -14 km. d = sqrt(X^2 + Y^2) = 100 km. b. Tan A = X/Y. A = 82o W of S. = 262o CW from +y-axis(bearing).

    posted on February 24, 2019
  93. Algebra

    29*180/6 = 870o = 150o CCW. sin150 = sin30 = 1/2.

    posted on February 23, 2019
  94. Algebra

    Correction: disregard my response to part b; I agree with bob' s answer.

    posted on February 23, 2019
  95. Algebra

    a. Growth factor = 100% + 23% = 123% = 1.23. Bacteria = 180 *1.23^8 = 943. b. Value = 226,000 - 0.03*226,000*5 = $192,100.

    posted on February 23, 2019
  96. Math

    D = M/V = M/L*W*h. D = 1050/LW*0.2 = 8.4 5,250/LW = 8.4, LW = 625 cm^2. L = W = sqrt(625) = 25 cm. 62

    posted on February 23, 2019
  97. math

    r = 245/3.5 = km/h. t = 90min. = 1.5 h. d = r * t =

    posted on February 23, 2019
  98. math

    a. d = 21[32] + 45[287]. X = 21*sin32 + 45*sin287 = -31.9km. Y = 21*Cos32 + 45*Cos287 = 30.97km. d = sqrt(X^2 + Y^2) = 44.46 km. b. Tan A = X/Y A = -45.8o = 314.2o CW from +y axis.

    posted on February 23, 2019
  99. Algebra

    Yes, that is correct.

    posted on February 22, 2019