Write each expression in simplest form.
4.3d + 6d
5.2 + 55-4
6. 2z+3-92-8

Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels