Plane a at 336 meters plane b just taking off , plane w at 13 meters per second plane b gaining 21 meters per second write an expression for the altitude of the planes after X seconds

i think the answer is seven, for if i'm being useless °ω°

step-by-step explanation:

answer: 2 answers

step-by-step explanation: the first one means to spread the product throughout the marketplace such that a large number of people can buy it.  

the second means the process of making a product or service available for the consumer or business user that needs it.

mark this brainliest and i will be glad to .

your answer   is c

step-by-step explanation: