What is a geometric sequence, what function does it relate to?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

Which number line correctly shows 0.8 + 0.3?

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y