exam Maths Puzzle Numerical Ability

Please help me pick the correct answer.

If x-y=6 and 3x^2+3xy-6y^2=60, then 9x+18y=

Answers:
a) 12
b) 15
c) 20
d) 24
e) 30

Read Solution (Total 0)

exam Other Question
What are the zeroes of this polynomial if b=-2: f(x)=x^2+2x+2b+bx? How do you factor by grouping, xy - 3x - 8y + 24, whats the answer?