X^2-81=x^2-9^2=(x+9)(x-9)
this is the answer
10%of 710 is 71
now we have 710-71=639
Answer:
probably about 3.5
Step-by-step explanation:
Unsure of what you're asking.
If you have an algebraic expression in front of you and see a number there, you could label it as "known" or "a known quantity." Another word that comes to mind is "constant."