Luke and Mark went out to lunch. Luke bought one sandwich and one cup of soda for $3.10. Mark bought 2 sandwiches and 3 cups of soda for $8.15. What is the cost of a
cup of soda?
Use s to represent cost of sandwiches.
Use c to represent cost of cups of soda.
Luke's Equation: 1
Mark's Equation:
Cost of a cup of soda:
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step-by-step explanation:

a and d

the answer is d

hope this

m=-16

step-by-step explanation:

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.