How can we find distance of two station when time and speed is given

Adriano loves anime and collects toys from his favorite series.each month he gains 4 toys. if adriano has 3 toys when he starts collecting, how many does he have after 4 months

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?