What is the easiest way to add and subtract negative numbers?

A student is asked to calculate the Pythagorean Triples for the number 15 using the identity (x2 - y2) 2 + (2xy) 2 = (x2 + y2) 2. The student's steps are shown below.

1/2 of a number is eight less than the number itself

The cone in the diagram has the same heght and base area as the prism. What is the ratio of the volume of the cone to the volume of the prism base area = B base area =

2 plus 2? just testing if this app really work

4325000 in scientific notation

What's the solution of the system? 7x+5y=19 -7x-2y=-16

Nina and her friends are going to the downtown rib festival. The festival organizers expect 10,000 people to attend the four-day festival. At the end of the festival the organizers say that they have exceed their expected attendance by 2000 people.

What is Y-3x=-7 y=-4x+7

Greatest command factor of 16 60 90

How to add and subtract polynomials