0.12 divided by 3.6 pls help me now

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Which of the following circles have their centers on the x-axis? check all that apply.

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%