Could someone help me? subject: Patterns it's pretty much the whole question itself I'm confused on.

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?