Question

Sam and Annika ride their bikes to school. Sam rides his bike (K )kilometers. Annika rides her bike two less than four times as many kilometers at Sam rides.

Explain why Sam must ride his bike more than 1/2 kilometer to school


Please help

Answer 1

s=k, a=4k-2

Annika rides her bike so she must travel some positive distance, ie a>0 so:

4k-2>0

4k>2

k>1/2 and that k is how far Sam rode, so Sam must ride his bike more than 1/2 kilometer.