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Jerlynn
May 6, 2017 13:42 PM

Since BC is twice as long as PB, and QR=PC=36cm, Therefore, (a) PB= 36/3=12cm Angle PRC (y) = 90 degrees - 58 degrees = 32 degrees Angle ACD (x) = 45 degrees (Half of a right angle) Therefore the sum of angle x and y will be: (b) 32 degrees + 45 degrees = 77 degrees
Comments (1)
  • Jerold.s 4 months 2 weeks ago.
    Thank you Jerlynn.
sabita
July 6, 2017 15:24 PM

(a) PB+BC=36 2PB=BC hence 3PB=36 or PB=12 (b) y=90-58=32 x=90-45=45 x+y=32+45=77 degrees
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Joshua_Lam
July 25, 2017 22:43 PM

Assuming bottom most layer of the object was not exposed to paint, else add accordingly, answer + 4*4*2*2 = 64cm^2 Surface area of top cube: 5*2*2 = 20cm^2 Surface area of second level of cubes: (12*2*2)-(2*2) = 44cm^2 Surface area of third level of cubes: (21*2*2)-(4*2*2) = 68cm^2 Surface area of last level of cubes: (32*2*2)-(9*2*2) = 92cm^2 Total area of solid which was painted blue = 20cm^2 + 44cm^2 + 68cm^2 + 92cm^2 = 224cm^2 In summary, (5+11+17+23)*4
Comments (1)
  • juliesim 1 month 3 weeks ago.
    Hi Joshua. Received notification email from direcTuition about your answer. Thank you so much.
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Joshua_Lam
July 25, 2017 22:58 PM

Assuming distance between each flag increases by 10cm each time, a) Distance between 7th flag and 4th flag = (40cm + 50cm + 60cm) / 100cm = 1.5m b) Distance between 1st and 80th flag = 10 * (n * (n + 1) / 2) = 10 * (79 * (79 + 1) / 2) = 31600cm 31600cm / 100cm = 316m
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richcr0025
March 7, 2017 02:18 AM

Jessica Sim
March 14, 2017 18:25 PM

Amanda : Belinda 5u 8u - 3u - 4u -------------------- 2u 4u (( 4u-2u) /2u x 100% = 100% more Present = 7 u 7u = $266 1u = 38 a) Belinda has 8 u = 8 x 38 = $304 b) 4/7 x 100% = 57.14%
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