Delete as this is the wrong answer. Made a typo in the answer.
Answer:
x = ![\frac{-212}{3}](https://tex.z-dn.net/?f=%5Cfrac%7B-212%7D%7B3%7D)
y = 24
Step-by-step explanation:
-3x - 8y = 20 .... (1)
-5x + y = 19 .... (2)
What we can do is take the (2) equation
-5x + y = 19
and solve for y by adding 5x to both sides
y = 24
now that we have y we substitute it in for y in equation (1)
-3x - 8(24) = 20
-3x - 192 = 20
we want to solve for x so we need to get its self.
add 192 to both sides
-3x = 212
now we divide both sides by -3. It's going to be a fraction.
x = ![\frac{-212}{3}](https://tex.z-dn.net/?f=%5Cfrac%7B-212%7D%7B3%7D)
option c is the answer....
Answer:
about 2000 years or 23999.97 months
Step-by-step explanation:
1,000,000 / 500
Amount decrease = 380 - 225 = 155
percent = 115/380 * 100 = 40.8 %