Question

considere a funcao do 1 grau dada pela lei y=7x-4.

Answer 1

c) f(x)=2
    7x-4=2
    7x=2+4
     x=6/7
d) y>0
   7x-4>0
   7x>4
     x>4/7
    

Answer 2

a) $\frac{4}{7}$
b) https://pt-static.z-dn.net/files/d59/cd75b71678e3493fc032b22876d2c582.png
c) $\frac{6}{7}$
d) $x \ \textgreater \ \frac{4}{7}$