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https://s3.amazonaws.com/dynamic.wizer.me/eb73e231-e130-4835-9d32-31a4e8c62d59   ??

Guest May 15, 2017
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13) radius = 18 in.            diameter = radius * 2 = 18 * 2 = 36   in.

 

14) diamter = 50 mm.       radius = diameter / 2      .....can you finish it from here?

 

15) radius = 8 ft.              area of semicircle = (1/2)(π)(radius2) = (1/2)(π)(82) = 32π   sq. ft.

 

16) Angles T and V are supplementary. That means

      angle T + angle V = 180º

      (5x + 20) + (40)    = 180º       ......can you finish it from here?

 

17) 5 shirts for $20 = $20 / 5 = $4 per shirt

       1 shirt for $3    = $3 / 1   = $3 per shirt      ....which is a better deal?

 

18) $200 plus 7.5% tax = 107.5% of $200 = 1.075 * $200  ...put this into a calculator.

 

19) You will save 40% of $85 ...that is 0.4 * $85

 

20) 106% of (75% of $400) = 1.06(0.75 * 400)

 

21) $60* (fraction) = $25    →    fraction = 25/60 = 41\(\frac23\)% ...so the sales percentage is 100% - 41\(\frac23\)%

 

22) In other words... 84º + whatº = 90º

 

23) In other words... 73º + whatº = 180º

 

24) Vertical angles are congurent, that means if angle x and angle y are vertical angles, the measure of angle x = the the measure of angle y.

hectictar  May 15, 2017

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