exam Maths Puzzle Numerical Ability

Solve

(2x + 3y = 7
(x - 2y = 7 (Use substitution.)

Read Solution (Total 0)

exam Other Question

We want to bbuild a pen out of 600 meters of fence. It is to be rectangular and divided into two congruent sections. What dimensions will give us the largest possible area?

I am lost. Do I have to use the derivative? 2(x-4)+6,5-x