B. Sandwich costs $7.70 and the soda costs $2.20
Answer:
Its C i think
Step-by-step explanation:
Expression consists of numbers, variables, and mathematical operations. The expression f(w)=5(w+4) is equal to f(9)=5(9)+20.
<h3>What is an Expression?</h3>
In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.
The expression is given to you is,

Now, if we solve the expression it can be written as,

substituting the value of w, we will get,

Hence, the expression f(w)=5(w+4) is equal to f(9)=5(9)+20.
Learn more about Expression:
brainly.com/question/13947055
Answer:
Step-by-step explanation:
C(m) = 6x + 25....the domain will be ur x value...and ur x value represents number of tickets bought......so the domain is best represented by :
whole numbers
it cant be integers because it cant be negative numbers
it cant be rational because it cannot include decimals..u cant buy part of a ticket
it cant be real because it cant include irrational numbers