Use equivalences to show that the equations are equivalent ∀x p(x) ∧ ∃y q(y, x) → ∃y r(y) ≡ ∃z ¬p(z) ∨ ∀y ¬q(y, x) ∨ ∃w r(w)

When eating out, record the total cost of your meal (before tip) and the tip that you left. determine the percent of the cost of the meal that you left as a tip.

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Anyone know? is appreciated! will mark brainliest if correct!