Dana’s new bike cost $180. Her parents agree to pay 60% of the cost if she will pay the rest. How much money will Dana need to save to help pay for the new bike?

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

What number should be added to both sides of the equation to complete this square? x^2-10x=7

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?