Based on U. S. census data, the following function T(p) models and estimates the time (in years) that will it take to reach certain amount of people p (in thousands) in a certain state since 1995. T(p) = -496 + 70.17ln (p) Which of the following represents the year when the state will reach and surpass a population of 1,800,000?

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!

It'll be 14/21, 8/12, and 10/15.14/21=2/312/16=3/48/12=2/310/15=2/3