Answer:
the value of x equals to 20 thats is solution okay
we know that f(1)=2 so f^-1(2)=1
so B is correct!
Answer:
Brooooo im stuck on the same one.
Step-by-step explanation:
Answer:
15<x<27
Step-by-step explanation:
Rule for the sides of a triangle:
The sum of the two smallest sides of a triangle must be greater than the biggest side.
In this question:
Sides of 6, 21 and x. We have to find the range for x.
If 21 is the largest side:
Two smallest are 6 and x.
x + 6 > 21
x > 21 - 6
x > 15
If x is the largest side:
Two smallest and 6 and 21. So
21 + 6 > x
27 > x
x < 27
Then
x has to be greater than 15 and smaller than 27. So the answer is:
15<x<27
The predicted time remaining has decreased by 30 years, so the second one would be the answer