Solve
1. X + 3 - X+ 4 = X + 5 - X + 6
X + 2 X + 3 X + 4 X + 5
2. Higher education French language registration in the USA from 1970 to 1998 can be modeled with the quartic function
f(x) = 0.004X - 0.2268X + 5.836X - 46.121X + 360.046, where f is in thousands and x is the number of years since 1970. Use this model to find the number of higher education French registration in 1970, 1980, 1990, and 1998. Then use this function to estimate the French language registrations in 2000. Round answer to the nearest thousand.
Please see the attached file for the fully formatted problems.