book Maths Puzzle Numerical Ability

Multiply by the vertical method..

(m^2) - 5mn + 3n^2) (m^2+4mn-2n^2)

Read Solution (Total 0)

book Other Question

Walt made an extra $10,000 last year from a part-time job. He invested part of the money at 6% and the rest at 9%. He made a total of $690 in interest. How much was invested at 9%? I need help!

2) Use the geometric sequence of numbers 1, 2, 4, 8,�to find the following:
a) What is r, the ratio between 2 consecutive terms?
Answer:
Show work in this