Perform the indicated operation. Show all necessary work. (a) -2-(-9)
(b) -2-9
(c) -2-(-9)-(-2)

Sara bought a pair of pants that were on sale for 30 percent off of the original price. if the original price of the pants was $29, what was the sales price of the pants?

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. how many hours after the truck's departure will the two meet?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?