5x-3(2x+7)=2x+9 step: 1 5x-6-21=2x+9 step2 -11x -21=2x+9 step 3 -13 x=30 step4 x=-30/13

Average acceleration: i have no idea how to do this.

Acone with volume 1350 m³ is dilated by a scale factor of 1/3. what is the volume of the resulting cone? enter your answer in the box. m³

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct