Last year, the seventh - grade enrollment at main middle school was 612 students. this year ,the enrollment dropped to 489 students due to the opening of a new middle school . which best reflects the percent change in enrollment at main middle school from last year to this year?

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Aquality characteristic of new iphone x made at the amsterdam plant at apple computers has a manufacturing specification (in mm) of 0.200 +/- .07. historical data indicates that if the quality characteristic takes on values greater than 0.27 or smaller than 0.13 the component fails at a cost of20.19. based on these data: determine the taguchi loss function (must show work) calculate an estimated loss for a quality characteristic of .30 calculate an estimated loss for quality characteristic of .40.