Add the product of 7 and 10 to 80 plz me fast

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]

Ineed no it anyone can see this

Do,h = (7, 9) (14, 18) the scale factor is