Work out the percentage change with a price of £80 is increased to £100

hep the ratio of the weight of shawn's dog to the weight of andy's dog is 5: 7 shawn's cat weight 23kg approimately how much does andy's dog weigh

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y