1.) A pizza is covered with multiple toppings. 𝟏/8of the pizza is covered in mushrooms, 𝟏/8 of the pizza is covered with onions, and the rest of the pizza is covered with only cheese. What fraction of the pizza is covered with only cheese?

Let's first find the total fraction covered by mushrooms and onions:
Total fraction covered by mushrooms and onions = 1/8 (mushrooms) + 1/8 (onions) = 1/8 + 1/8 = 2/8 = 1/4

Now, let's find the fraction covered with only cheese:
Fraction covered with only cheese = 1 - 1/4 = 3/4

Therefore, the fraction of the pizza covered with only cheese is \boxed{\frac{3}{4}} .