Answer:
2/10 (1/5)
Step-by-step explanation:
to do this, you know that the marble is put back, so you have an equal chance each time. then, find how many black marbles there are, and go from there.
Answer:
CE = 17
Step-by-step explanation:
∵ m∠D = 90
∵ DK ⊥ CE
∴ m∠KDE = m∠KCD⇒Complement angles to angle CDK
In the two Δ KDE and KCD:
∵ m∠KDE = m∠KCD
∵ m∠DKE = m∠CKD
∵ DK is a common side
∴ Δ KDE is similar to ΔKCD
∴ 
∵ DE : CD = 5 : 3
∴ 
∴ KD = 5/3 KC
∵ KE = KC + 8
∵ 
∴ 
∴ 
∴ 
∴ 
∴ KC = (8 × 9) ÷ 16 = 4.5
∴ KE = 8 + 4.5 = 12.5
∴ CE = 12.5 + 4.5 = 17
Answer:
33
Step-by-step explanation:
Supplementary angles add up to 180 degrees. So, 4x + (x+15) = 180
5x+15=180
5x=165
x=33
Answer:
The best to buy is Second one as you will get more profit from that
Answer:
15 I think
Step-by-step explanation:
75% shure check your self to be safe