Why is there not an associative property of subtraction?

How many minutes are there in 600 seconds

There are 40 students in a certain math class. Of these students, only 65% turned in the first homework assignment. How many students turned in the first homework assignment?

How do you find the volume of cylinder that has a void? like what is the formula for calculating the void?

How many squares with side length 1/4 inch will fit into 1 square inch? How many squares with side length 1/4 inch will fit into 1 square inch? A) 1 B) 16 C) 4 D) 25

What is the answer to 8/15 * 5/8

In the diagram what is m

Joan is building a sandbox in the shape of a regular pentagon. The perimeter of the pentagon is 35y4 - 65x3 inches. What is the length of one side of the sandbox?

Does anyone know the answer to this question?

Jack wants to buy 30 chocolate chip cookies that are $1.25 each. If sales tax is 7.5%. What will Jack's total bill be?

Linda did jumping jacks every night for a week. She did 75 on each of the first three nights and 2 times as many on each of the remaining nights. How many total jumping jacks did Linda do that week?