Irene cut a quadrilateral from construction paper and measured three of the angles with his protractor. they measured 72 degrees,120 degrees, and 85 degrees. her protractor broke before she could measure the last angle. how can irene determine the measure of the missing angle without using a protractor?

(feel free to explain how you got your answer! : )

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours

55 degrees because 55+55=110 degrees