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Guest May 15, 2017

#1**+3 **

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)(radius^{2}) = (1/2)(π)(8^{2}) = 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 + *what*º = 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