The population of San Francisco in 2018 was about 870,000. The population of the United
States was about 327 million in 2018.
(part a)
Write each population in scientific notation.
(part b) About how many times larger was the
population of the United States than the
population of San Francisco

Ithink the answer is a

The following relation is not a function

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.

Ithink the answer may be -7 by when dividing both sides by -3