Need help ASAP plz 37 points

Triangles abd and ace are similar right triangles. witch ratio best explains why the slope of ab is the same as the slope of ac?

If f(x)= x^2 - 4 and g(x)=x^2 + 2 x, (b). (f-g)(x) i think i know the 1st 2 steps: f(x)-g(x) x^2-4 - x^2+2x

We can measure temperature in two different common units: degrees celsius and degrees fahrenheit. the variable f represents the temperature in degrees fahrenheit that is equivalent to c, the temperature in degrees celsius. f=32+1.8c what is the temperature increase in degrees fahrenheit that is equivalent to a temperature increase of 10 degrees celsius?