A =
930
rounded to the nearest 10
b
=
82.8
rounded to 1 DP
Find the maximum of
a
×
b

Can someone me and do the problem plz so i can understand it more better

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

What is the result of adding the system of equations? 2x+y=4 3x-y=6