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

If y + 3y + 5y = - 18, then what is the value of y?

What is the product? (45+2) (5s2 + 10s+3)

Factor completely 3x4 - 48. 3 (x2 - 4) (x2 + 4) 3 (x - 2) (x + 2) (x + 2) (x + 2) 3 (x - 2) (x + 2) (x2 + 4) 3 (x - 2) (x + 2) (x2 - 4)

Why is 16:14 and 64:60 not equivalent

The base of pyramid A is a rectangle with a length of 10 meters and a width of 20 meters. The base of pyramid B is a square with 10-meter sides. The heights of the pyramids are the same.

Students were asked how many pairs of shoes they owned. Their responses were 8, 2, 1, 5, 7, 6, 2, 2, 8, and 3. urs the The mean of the data is

Convert. 0123 to a percent

Joe's house is 5.5 km from the creek, the distance between Jane's house and the creek is twice as far as Joe's house how much further is Jane's house from the creek than Joe's house in meters metric

John had 84 dollars, and his brother Fred owed 12 dollars to his friend. John gave his brother some money. Fred paid his debt and now both of them has the same amount left. How much money did John give Fred?

True or false: dilations map angles of the same degrees