What t represent for the equation a(t)=210-15t

Ascatter plot with a trend line is shown below. which equation best represents the given data? y = x + 2 y = x + 5 y = 2x + 5

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b.false

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n