A cup on the teacher's desk contains 12 pens. There are 3 pens with blue ink and 9 pens with black ink. One student at a time selects a pen at fundam to sign the attendance sheet and then puts the pen back in the cup. What is the probability that the first three students all randomly select a pen with blue ink? A.1/4
B. 1/27
C. 1/64
D.1/220​

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

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.

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i