Answer:
C) 405.3 ft
Step-by-step explanation:
A triangle is a polygon with three angles and three sides. Types of triangle are scalene, isosceles, equilateral, right angled triangle.
Given a triangle with angles A, B, C and the corresponding sides directly opposite to the angles as a, b, c. The sine rule states that:

In the triangle formed by point C, ship B and ship A, we have ∠A = 82°, ∠B = 78°, c = AB = 140 ft. Hence:
∠A + ∠B + ∠C = 180° (sum of angles in a triangle)
82 + 78 + ∠C = 180
∠C + 160 = 180
∠C = 20°
Using sine rule:

a =  distance from Ship B to the signal fire at point C
 
        
             
        
        
        
Answer:
The first one is 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
See step-by-step explanation
Step-by-step explanation:
Question 3: (4, -3) 
Solving through elimination: Multiply the first equation by -3. 
-3x+6y=-30
 3x-5y = 27
Add. The x drops out. 
y= -3 
Substitute -3 in for y. 
x-2y=10
x-2(-3)=10
x+6=10
x=4
Question 4: (2,5) 
Solve through elimination: Multiply the second equation with 3. 


3/2= 6/4
15/4x=7.5
x=2
3/2 (2) + y = 8
3+ y =8 
y=5
Question 5: (6,4)
Use your graph to graph. 

Slope of -1/3 
Y-intercept of 6 (0,6)
X-intercept of 18 (18,0)

Slope of 3/2 
Y-intercept of -5 (0,-5)
X-intercept of  (
 (
Question 6: (5, -7)




Solve by substitution: 
Words of encouragement: 
Good luck!
 
        
             
        
        
        
Answer:
64
Step-by-step explanation:
20 + 20=40 
12 +12 = 24
24+40=64