Charlotte is training to run a marathon. she just finished a 12 mile run. that distance is 6 miles farther than 3 times the distance she could run when she started training. the equation 3d + 6 = 12 represents this situation.

how far could charlotte run when she started training?

a. 6 miles
b. 1.5 miles
b. 2.5 miles
d. 2 miles

step-by-step explanation:

i have done this all on a piece of paper but idk how to put it on here cuz it needs to be drawn

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.