During the period 1990-2002, the average cost d (in dollars) for a new domestic car and the average cost i (in dollars) for a new imported car can be modeled by d= 423.12t+14475 and i= -135.63t^2+2705.2t+12121 where t is the number of years since 1990. write an equation that gives the total average cost for domestic and imported cars as a function of the number of years since 1990.

answer:

try algebra.com

step-by-step explanation:

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

#15. square

step-by-step explanation:

because quadrilatural (idk how to spell it) means somthing that is not 3d or like, equal sides (or somthing like that   you know what i meanz)

hope this halps!

bai!