The number of tourists visiting a city doubles every month during the two-month period beginning in Jan. 1st and ending in Feb. 28th each year. If the number of tourists who visited the city in the beginning of January in that particular year was x, how many tourists visited the city at the end of February that

2x

Step-by-step explanation:

The number of tourists visiting at January is given as x and since the number of tourists doubles every month then by the end of feburary will be 2 multiplied by x

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.