DEVORIA2001
04.02.2020 •
Mathematics
Abox of cookies contains 10 chocolate chip, 5 peanut butter, and 5 sugar cookies. when choosing a cookie at random, what is the probability of choosing a chocolate chip, then a sugar cookies without replacing the chocolate chip?
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Ответ:
10+5+5=20 10/20 or 1/2
sugar cookie
9+5+5=19 5/19
Ответ:
∠A = 52 x + 40
∠B = 72 x + 20
∠C = 32 x + 20
∠D = 32 x + 40
∠A +∠B +∠C +∠D = 360° = 52x+40+72x+20+32x+20+32x+40
= 188x + 120
188x +120 = 360°
188x =240°
x= 240/188 =1.27°
∠B = 72x+20= (72×1.27)+20 =111.44°