10 dictionare si 2 truse de stiinte costa 550 lei 10 dictionare si 5 truse de stiinte costa 1150 lei cat costa un dictionar ? cat costa o trusa de atiinte

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

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Rounded to the nearest tenth, what is the value of x