GMAT Exam

If the function f(x) is defined for all real numbers x as the maximum value of 2x+4 and 12+3x,then for which one of the following values of x will
f(x) actually equal 2x+4 ?
(A)–4
(B)–5
(C)–6
(D)–7
(E)–9

Read Solution (Total 3)

options starts with minus
a)-4
b)-5
c)-6
d)-7
f)-9
12 years agoHelpfull: Yes(2) No(3)

substitute x in the above equation 2x+4 the value should match i.e
rhs = lhs

i guess -4 works just fine
10 years agoHelpfull: Yes(0) No(0)
x=-9 2x+4=-14 12+3x=-15 max=-14
ans=-9
10 years agoHelpfull: Yes(0) No(0)

GMAT Other Question

Each Employee at a certain bank is either a clerk or an agent or both. Of every three agents, one isalso a clerk. Of every two clerks, one is also an agent. What is the probability that an employeerandomly selected from the bank is both an agent and a clerk? The ratio between the ages of Son and his mother is 1: 2 and that of Son and his father is 1: 3 at the time of Son's birth. If son is 10 years old now. Find out the ratio between the ages of son's mother and father at present.