Answer:
Some people just put those links for virus so don't click on them, and i don't think they actually read the question.
Answer: it is called the powers of ten
Step-by-step explanation:

=47.8888 when you round it up you can get get about 48 then you estimate to about 50.
Answer:
The perimeter is the length of the outline of a shape. To find the perimeter of a rectangle or square you have to add the lengths of all the four sides. x is in this case the length of the rectangle while y is the width of the rectangle. The area is measurement of the surface of a shape.
Step-by-step explanation:
Answer:
x = 7
Step-by-step explanation:
4x+5x=63
Combine like terms
9x = 63
Divide by 9
9x/9 =63/9
x = 7