Consider the expansion of .
x(2x^2+ a/x)^7
The constant term is 20 412. Find a.

Think of it as five or above give it a shove. change the 5 or above to the right to a zero and add one to the number on the left.

The skating rink rented 872 pairs of skates during april and may.why? : if the skating rink rented three times the pair of skates in april during may, they rented 654 skates. 218 x 3 = 654then, if they want to know how many they rented during both april and may, then you just add 654 (may) and 218 (april) to give you 872 pairs of skates for both months.654 + 218 = 872hope this !