The number sentence 4x7 =4x3+4x4 is an example of what property?

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?

Describe a situation where it would be beneficial to round decimals to the nearest dollar. explain why you would use rounding in that situation.

4percent of a number is what fraction of that number? ? i really need asap