Answer:
a=-8
b=-29
Step-by-step explanation:
Let's assume
first number is a
second number is b
the difference of two numbers,a and b,is 21
so, we get

we can solve for 'a'

the difference of five times a and two times b is 18
so, we get

now, we can plug 'a'

now, we can solve for b




now, we can find 'a'


The ratio between 28,000 and 14 is 2000 : 1
<h3>How to determine the ratio?</h3>
The numbers are given as:
28,000 and 14
Express as ratio
Ratio = 28000 : 14
Divide each number by 14
Ratio = 2000 : 1
Hence, the ratio between 28,000 and 14 is 2000 : 1
Read more about ratio at:
brainly.com/question/2328454
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Where is the question ? !
Answer:
a variable.
Seven is a number and cannot be a variable.