What is a equivalent ratios 3:11

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

How does reflecting or rotating a figure change the interior angles of the figure?