谢谢!请帮忙!
268. Henry purchased 3 items during a sale. He received a 20 percent discount off the regular price of the most expensive item and a 10 percent discount off the regular price of each of the other 2 items. Was the total amount of the 3 discounts greater than 15 percent of the sum of the regular prices of the 3 items?
(1)The regular price of the most expensive item was $50, and the regular price of the next most expensive item was 20.
(2)The regular price of the least expensive item was $15.
A):A
266.Marta bought several pencils. If each pencil was either a 23-cent pencil or a 21-cent pencil, how many 23-cent pencils did Marta buy?
(1)Marta bought a total of 6 pencils. (2)The total value of the pencils Marta bought was 130 cents.
A):B
264.Is 2x-3y<x2
(1)2x-3y=-2 (2)x>2 and y>0
A)
263. Is m≠n?
(1)m+n<0 (2)mn<0
A):B
257.Does the integer k have a factor p such that 1<p<k?
(1)k<4! (2)13!+2≦k≦13!+13
A):B
255.If x is to be selected at random from set T, what is the probability that 1/4x-5≦0?
(1)T is a set of 8 integers. (2)T is contained in the set of integers from 1 to 25, inclusive
A):Effice ffice" />
| 
