Abcd is a quadrilateral. three of the angles of abcd measure 100°, 87°, and 106°, respectively. find the measure of the missing angle.
a. 67°
b. 74°
c. 80°
d. 87°

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?