Hey! can someone check my answers?
1.find the greatest common factor: 20y^9 +5y^6
a. 5y^6
b. 5y^9
c. 10y^9
d. 20y^3

and

2. find the greatest common factor: 12xy^5+ 60x^4y^2 _ 24x^3y#3.

a. 3x^4y^5
b. 6xy^5
c. 6xy^2
d. 12xy^2

If angle 2=3x +1 and angle 3=2x +4what is angle 2

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?