Answer:
im your best friend
Step-by-step explanation:
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'


Answer:
The relation ship between ration and rates is they compare numbers
Step-by-step explanation:
Please give brainliest
Answer:
Mutations can cause Instant adaptation, while natural selection is the process by which adaptations occurs overs a series of generation. Adaptation are changes or processes of changes by which an organism os species becomes better suited for it's environment. A mutation us an alteration of the DNA sequence.