If ^nC_(r)+^nC_(r+1)=^n+1C_(x), then x=? （ ） A . r B . r-1 C . n D . r+1

Start time 7:20 am. 8:58 am ending time elapsed time between them are

Iron has unit cell edge length of 286.65pm. If density of iron is 7.87g/cm3. Calculate nature of unit cell

Very large or very small numbers are best input with exponential notation. For instance, the number 8,000,000 (eight million) is equal to 8×106 . In this course, you can enter that as either 8 * 10 ^ 6 or as 8e6 in these problems. Try out exponential notation in the question below. One light year is equal to 9,460,730,472,580.8 kilometers. Enter this number below in exponential notation. The tolerance on this question is 5%. ________km

A car rental agency currently has 44 cars available, 28 of which have a gps navigation system. one of the 44 cars is selected randomly. find the probability that this car

what are the different types of fibres produced during cell division​

Floor drains are rapidly becoming extinct in the United States because they: A) Can create severe Environmental Protection Agency violations B) Cause slips and trips C) Are unsightly and often smell bad D) Are too expensive to include in new construction

Give two reasons to justify— An iron almirah is a solid at room temperature.

Express the following decimals in the form (p)/(q). 0.003overline (52)

the circumference of a circle is proportional to its diameter.the relationship can be expressed

Prove that the points A(-5,4), B(-1.-2) and C(5,2) are the vertices of an isosceles right angled triangle. Also, find the coordinates of D, so that ABCD is a square.