I hope this hepls you
f⁻¹(x)=3x+7
f⁻¹(4)=3.4+7=19
Answer:
simplified version is 
Step-by-step explanation:
1.) find possible factors to 27 that have one perfect root (in this case, its 9)

2.) square each number in the radical

3.) simplify

Answer:
I believe the answer is 2.22 which is letter c
Step-by-step explanation:
4/5, because to simplify a decimal, you can divide the numerator by the denominator. 4 divided by 5 is 0.8