Answer:
Step-by-step explanation:
12). By applying Pythagoras theorem in the given right triangle,
Hypotenuse² = (Leg 1)² + (Leg 2)²
x² = 7² + 7²
x² = 2(7)²
x = 
x = 
13). By sine rule,
sin(60)° = 

y = 
y = 18
By cosine rule,
cos(60)° = 

x = 
x = 
14). By applying Pythagoras theorem in the given right triangle,
12² = x² + x²
144 = 2x²
72 = x²
x = √72
x = 6√2
Answer:
1. 5 hours
2. 4 hours
Reason:
Formula for speed is speed =
, if you want to find time, then take distance / speed, which will equal to 100 / 20 = 5 hours, and the same with 2.
Answer:
No
Step-by-step explanation:
The square root of any negative number is not a real number.
Answer:
area = 488 cm^2
Step-by-step explanation:
area = (17x22) + (19)(12)(0.5)
area = 374 + 114 = 488 cm^2