Year Population 1850 23,191,876
1860 31,442,321
1870 38,558,371
1880 50,189,209
1890 62,979,766
1900 76,212,168
a. Find BOTH a linear regression equation and a quadratic regression equation for the data set.
Write the models in proper form.

Two numbers have a sum of -19. one number is x. what expression represents the other number?

What is the value of x in the equation7x+2y=48 when y=3

Ican interpret and represent the remainder in division calculations sensibly for the context (eg if we wont to know how many 40 seat buses will be needed to transport 170 students for on excursion, we divide 170 by 40 and realise buses and another smaller vehicle to that we need 4 transport 10 more students) solve the following questions. show your work! 11) the zoo had 420 butterflies that needed to be transported to a new enclosure. the boxes that the butterflies would be moved in only hold 80 butterflies in each. how many boxes would they need? 2 12) each classroom in the school can have exactly 25 students, if there are 345 students in the school how many full classrooms are there?