Mrs Koh baked some doughnuts. If she gives 7 doughnuts to each of her friends, she will have 4 doughnuts left. If she gives 9 doughnuts to each of her friends, she will have a shortage of 2 doughnuts. How many doughnuts did Mrs Koh bake? ​

The distance around the lake is 2 kilometers. ifelena wants to run 14 kilometers this week, howmany laps must she run around the lake

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters