A new model of a cell phone was released while the original model was still being sold. The average number of the original model sold each week was 2750, which decreased by 21% each week after the new model was released. Which function can be used to determine the average number of original model cell phones sold each week x weeks after the new model was released?

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180