(5/6 x 5/4) / 4/3 i need an answer to this math question

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)