Mathhh pl

1) which of the following function are one-to-one ? select all that apply.

a)f(x)=x-1/3x+3

b)f(x)=√5x+9

c)f(x)=7/4x^2

d)f(x)=1/2x^3

d)f(x)=3x^4+7x^3

2) find f^-1 for the function f(x)=∛x-2+8

a) f^-1(x)=(x-8)^3+2

b)f^-1(x)=(x+8)^3+2

c)f^-1(x)=∛x-8+2

d)f^-1(x)=(x-8)^3-2

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?