PLEASE HELP people with type O negative blood or universal donors. That is, any patient can receive a transfusion Of O-negative blood. Only 12% of the American population has O negative blood. 10 people appear at random to give blood, what is the probability that none of them is the universal donor.
1-0
2-0.280
3-0.526
4- 0.720
5- 1

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126

Drag the tiles to the boxes to form correct pairs. not all tiles will be used. match each set of vertices with the type of quadrilateral they form