Solve the following quadratic equation using the quadratic equation

x^2+4x+1=0

A:x={2,−2}

B:x={3√, −3√}

C:x={1, −5}

D:x={−2+3√,−2−3√}

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168

the height of the surface increases from the center out to the sides of the road

it is c!