The <u>Cavalieri's principle</u> states that if two or more figures have the same cross-sectional area at every level and the same height, then the figures have the same volume
therefore
The cross-sectional area at every level must be the same
Steps: 1. Substitute the y in 4x + 10 with -5x-10 -5x-10= 4x + 10 2. Add 5x on both sides -10= 9x + 10 3. Subtract 10 on both sides -20= 9x 4. Divide by 9 on both sides 5. Your answer is X= -20/9
