Answer:
white 2/3
blue: 4/7 * (1 - 2/3) = 4/21
red: 1 - 2/3 - 4/21 = 1/7
15 / (1/7) = 105 boats are in the marina.
This means that the door is open because half of a circle (360) is 180 and that means it’s open because u can’t open a door all the way at a 360
You can check your answer by multiplying 3 with 4 <span>and then add 6 to the product. Then your result will be 18.</span>
We can use two different methods to find our missing angle:
Subtract the two known angles from 180° :
Plug the two angles into the formula and use algebra: a + b + c = 180°
Answer: speed is 540 km/h
Step-by-step explanation: Lets mark speed as v.
Because distenace is same, you can mark 6 h · 900 km/h = 10 h · v
and v = 5400 km / 10 h = 540 km/h.
Or using inverse proportions : 10 h / 6 h = v / 900 km/h .
Before multiplying you turn lastproportion around :
10 h / 6 h = 600 km/ h / v ,which gives 10 v = 6 · 900 km/h
and result is same
