2x + 5y = 7
2x – 3y = 15
• Multiply one of the equation
by a (-1) to set it up for elimina
• Eliminate the variables
whose coefficients are opposit
• Add the other terms.
• Solve the resulting
one-step equation.

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8