This is the answer:
a = 12
Answer:
d) 9 years
Step-by-step explanation:
let present age as 'x'.
then, x=2x-3(x-6)
x=2x-3x+18
x= -x+18
2x=18
x=18/2
x=9
Answer: 0.0594
Step-by-step explanation:
Given : The population proportion of adults questions reported that their health was excellent : p = 0.42
Among the 14 adults randomly selected from this area, only 3 reported that their health was excellent.
i.e. Sample size : n= 14


z-score : 
Put x= 3

Then, the probability that only 3 or fewer report having excellent health:-

Hence, the required probability : 0.0594
Answer:
p = 42.6 (Rounded up)
I am unsure if you need an explanation.
If you want to solve the equation x / 5 + 9 = 4, then you'll have to make x be on it's own, like this: x = -5 * 5, which gives us -25! Hope this helped! Brainliest is always appreciated.