Determine if the lines are perpendicular

Which number produces a rationale number when multiplied by 1/5

Which statements are true about additional information for proving that the triangles are congruent check all that apply

Cherie works in retail and her weekly salary includes commission for the amount she sells. the equation s=400+0.15c models the relation between her weekly salary, s, in dollars and the amount of her sales, c, in dollars. interpret the slope of the equation.