Multiply and simplify
(x-3y) (x + 3y)

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

Lana's family entered a 5-kilometer race lana's average step length is about 0.5 meter how many steps will she need to take the finish

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13