Answer:
Given:
x-y=-4
2x+y=4
Step-by-step explanation:
x-y=-4
2x+y=4
add both the equation, we get
⇒ x-y=-4
2x+y=4
⇒3x=-4+4
⇒3x=0
⇒x=0
∴ to find the value of y, put the value of x in any one equation
⇒x-y=-4
⇒0-y=-4
⇒-y=-4
⇒y=4
∴ x=0, y=4
Answer: 45°
Step-by-step explanation:
Angle a° is alternate with angle 45°
Therefore a°=45°
Answer:
1 minute to sail 17/306 = 1/18th of a nautical mile
234 minutes to sail 1/18 x 234 = 13 nautical miles.
Hope this helps :-)
Step-by-step explanation:
The ans is:
cos 20 =x/80
x=75.2
