In how many ways can you make $.80 in change without using pennies or half-dollars

This question awards 100 ! i really don’t want to fail i will also mark you !

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?