After being rearranged in simplified, which of the following equations could be solved using the quadratic formula? check all that apply.
a. 2x^2+x^2+x=30
b. -x^2+4x+7= -x^2-9
c. 5x+4=3x^4-2
d. 9x+3x^2=14+x-1

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry. how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.

Write the slope intercept equation for line ab.