What is the internal angle sum of a quadrilateral? (Hint: A quadirlateral has 4 sides.) OA) 90 OB) 180 OC) 360 OD 540 A.) 90°
B.) 180°
C.) 360°
D.) 540°​

The internal angle sum of a quadrilateral is :

C. 360°

The sum of internal angles of a polygon is determined by a formula :

where n represents number of sides.

In a quadrilateral there are four sides,

So, plugging 4 in the formula :

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x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)

this is a good question! i'll do some research and come back when i have the answer!