If fx)=x+3 ÷ 4 what is the equation for f^-1(x)

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?