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

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

idk

step-by-step explanation:

pls refer ro the top for answer

1k

step-by-step explanation:

-6k+7k

(-6+7)k

1k