At the school supply store, Kayla buys 5 pencils and an eraser. The eraser costs 45 cents. If her total bill was $1.70, how much is each pencil? Define a variable, create an equation using that variable, and solve using inverse.

Need the answer quickly please!

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.