Answer:
3
Step-by-step explanation:
The lights and pole form a right triangle. The question gives the hypotenuse as 5 and one side length as 4.
Use the Pythagorean theorem: 
.
Plug in what you are given: 
b = 3
Or you could recognize that it was a pythagorean triple: 3, 4, 5
I would say the first option
Answer 10x + 6 is greater than or equal to 42.
Step-by-step explanation: The greater than or equal to symbol is not on here, but it’s > with a line underneath.
X^2+y^2-8x+4y+4=0 can be written as (<span>x- 4)² + (y+2)²-16-4+4=0, or
</span> (<span>x- 4)² + (y+2)²=16, this is not a an equation of parabola, it is a circle's
</span>its center is (4, -2) and its radius r=4
