Why do perfect squares only end up with certain numbers in the last place?

What is the value of x? 14-x=21

Which of the following relations represents a function? { (4,2), (4,3), (4, 5), (4,7) } { (-2, 1), (0,5), (1, - 3), (-2, 0) } { (-1, 3) (-2, 3) (-1, 5) (-2,5) } { (-3, 1), (1, 4), (-2, 1), (0, 3) }

Your family goes out to Chili's for dinner. Chili's charges $9 for an adult dinner and $5 for a child's plate. Ten members of your family went to dinner and your bill was $66. How many adults and children ate at Chili's?

What is 5/12 - 5/18

Lindsay needs to purchase a car. The car she is planning on purchasing costs $8000 and she has $2000

Teresa graphs the following 33 equations: y=2x, y=x2+2, and y=2x^2. She says that the graph of y=2^x will eventually surpass both of the other graphs. Is Teresa correct? Why or why not?

What number can you multiply by 2 to get 256

Of the 80 houses in a development, 50 have a two-car garage, 40 have an in-the-ground swimming pool, and 35 have both a two-car garage and an in-the-ground swimming pool.

Gaussian surface 1 has twice the area of Gaussian surface 2. Both surfaces enclose the same charge Q. Is the electric flux through surface 1 greater than, less than, or the same as the electric flux through surface 2?

The radius of earth is 6378.1 km, which is 18,243.9 km less than the radius of neptune. find the radius of neptune