Marcela Minoza

1.A book and a bookmark together sell for $10.10. If the price of the book is $10 more than the price of the bookmark ,find the price of the book and the price of the bookmark.

.Three people decide to share the cost of a yacht, By bringing in an additional partner they can reduce the cost to each person by $4000 .What is the total cost of the yacht?

An investment of $2500 is made at an annual interest rate of 5.5% .How much additional money must be invested at an annual simple interest rate of 8% so that the total interest earned is 7% of the total investment?