Question

help asap! i will give brainliest!

Answer 1

#1

$\\ \sf\longmapsto f(x)=5x-1$

$\\ \sf\longmapsto f(0.2)=5(0.2)-1=1-1=0$

#2

$\\ \sf\longmapsto f(x)=89$

$\\ \sf\longmapsto 5x-1=89$

$\\ \sf\longmapsto 5x=89+1=90$

$\\ \sf\longmapsto x=\dfrac{90}{5}$

$\\ \sf\longmapsto x=18$