Factorise:
X2-3x+2
X2-2x-3
X2+2x-8
Please help

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.