my salary is now €450 after an increase in the ratio 10 :9 .What was my salary before the increase??​

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?