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A man runs 10 miles per hour for 2 1/2 hours. If
a woman runs the same distance in one hour, what is the woman’s average
speed in miles per hour ?
(A) 8
(B) 4
(C) 16
(D) 64
(E) 24
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(A) 0
(B)
(C) 5/3
(D)
(E) 1
J = and K = J3, what is K - J ?
(A) 1/6
(B) -8/27
(C) 1/3
(D) 8/27
(E) -10/27
If a2 -5ab + b2 = 25 and a2 + 7ab + b2 = 40, what is the value of ab?
(A) 5/4
(B) -7˝
(C) 65/12
(D) +7˝
(E) 4/5