The ratio of the number of boys to the number of girls in a class is 5 to 7. How many boys are there if there are 21 girls?

Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.

The floor plan of a room has a scale of 2.5 in.: 35 ft. in the drawing, the length of the room is 8 in. and the width of the room is 6 in. what is the perimeter of the actual room?

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike