H(x) = -x² - 4
i(x) = 2x + 3
h(i(5)) = -(2(5) + 3) - 4
h(i(5)) = -(10 + 3) - 4
h(i(5)) = -(13) - 4
h(i(5)) = -13 - 4
h(i(5)) = -17
No teaspoon would take forever if you want though but you can use this instead quarts it's way easier oh and 1 gallon is 4 quarts hoped this helped.
the answer is 20.4 and I hope this helps!
