Answer:
The secret ingredient has 5/6 cups
Explanation:
we know that
The secret ingredient consists of 2/3 cup mayo and 1/6 cup honey mustard
To find out how many cups is the secret ingredient, sum the cups of mayo and the cups of honey mustard
Let
x ----> the cups of mayo
y ---> the cups of honey mustard

Multiply by 2 both numerator and denominator of 2/3

substitute
Remember that when add fractions with the same denominator, add the numerators and write the sum over the common denominator