Put in ascending order 0.32, -1.9, square root, 2 pi, 2/3

Me asap on # : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.

How many solutions does the nonlinear system of equations graphed below have?

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.