Can you me?

the amount of tax for each camera is $5.25 and the tax rate is 6%. explain how the equation:

(original cost)(percent) = tax amount

is adjusted to solve for the original cost.

Do 12/14 and 8/10 have the same value? explain your answer.

Can someone me and plz do the problem

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?