Answer:
√5
Step-by-step explanation:
√(x2 - x1)² + (y2 - y1)²
√[-2 - (-1)]² + [0 - (-2)]²
√(-1)² + (2)²
√1 + 4
√5
Answer:
(-4,-1)
Step-by-step explanation:
-3x+10y=2
-3x+3y=9
-3x=2-10y
-3x=9-3y
2-10y=9-3y
2-9=10y-3y
7y=-7
y=-1
-3x+3(-1)=9
-3x-3=9
-3x=12
x=-4
$6 ? 5+4 =9
9-3 =6
I don't know if this is correct but this is how I would do it
To minimize the cost, we take the straight distance from the refinery to the other side of the river as 2 km. Also, the 7 km will be the distance that has to be traveled by the pipeline in land. The total cost, C, is therefore,
total cost = (2 km)($800,000/km) + (7 km)($400,000 /km)
total cost = $4,400,000
Thus, the total cost of the pipeline is approximately $4,400,000.00.