Answer:
49145 years
Step-by-step explanation:
In a certain country the life expectancy for women in 1990 was 45 and in 2000 it was 85?years.
Assuming that life expectancy between 2000 and 2100 increases by the same percentage as it did between 1900 and 2000,what will life expectancy be for women in 2100?
In 10 years, the expectancy increased by 85/45 = 17/9
between 2000 and 2100, it will increas by 10 time 10 years, so expected expectancy is 
years
Explanation of what exactly
The circumference of a circle is pi • diamter
3.14 • 50 = 157 meters
Simplifying
2(4x + -6) = 8x + -12
Reorder the terms:
2(-6 + 4x) = 8x + -12
(-6 * 2 + 4x * 2) = 8x + -12
(-12 + 8x) = 8x + -12
Reorder the terms:
-12 + 8x = -12 + 8x
Add '12' to each side of the equation.
-12 + 12 + 8x = -12 + 12 + 8x
Combine like terms: -12 + 12 = 0
0 + 8x = -12 + 12 + 8x
8x = -12 + 12 + 8x
Combine like terms: -12 + 12 = 0
8x = 0 + 8x
8x = 8x
Add '-8x' to each side of the equation.
8x + -8x = 8x + -8x
Combine like terms: 8x + -8x = 0
0 = 8x + -8x
Combine like terms: 8x + -8x = 0
0 = 0
Solving
0 = 0
Answer: option A. 25.
Explanation:
1) f [g (1) ] ⇒ find the image of g(1) and use it as the input for f(x).
2) g(x) = 5 => g(1) = 5
3) f (g (1) ) = f (5) = (5)² = 25
That is the answer: f [ g(1) ] = 25.
