Let
C=Cynthia's age today
A=Abigail's age today
then
at all times
A=C+8......................(1)
twenty years ago,
A-20=3(C-20)
simplifying
A=3C-40...................(2)
Equate (1) and (2),
C+8=3C-40
8+40=3C-C
C=24
=>
A=32
Check: A-C=8... ok A-20=12 C-20=4 => (A-20)=3(C-20) ...ok
Answer:
Abigail is 32, Cynthia is 24.
To find 29/9 as a mixed number you need to find out how many times does 9 fit in 29
9
18
27
36
We see that it fits 3 time 3 is your whole #
We also see that 29 - 27 = 3 so you write like this:
3 3/9
The denominator of the original fraction does change
Answer: 11 units
Step-by-step explanation:
Use the distance formula: 
The level of each growth factor is an illustration of a combination
There are 90 ways of combining one level from each growth factors
<h3>How to determine the
number of combinations?</h3>
From the complete question (see attachment), we have the number of levels in each growth factor is:
Lighting = 3
Age = 5
Temperature = 2
Humidity = 3
So, the number of combination (n) is:
n = 3 * 5 * 2 * 3
n = 90
Hence, there are 90 ways of combining one level from each growth factor.
Read more about combination at:
brainly.com/question/11732255
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