Please help me before 3pm est A deli sells small, medium, and large sack lunches. Each bottle of water costs $1,

and each apple costs $1. Each sandwich costs s dollars. Some customers buy

sack lunches, and some customers buy items separately.

• Amy buys 8 sandwiches and 12 waters. Her total cost is 8s + 12.

• Bob buys 8 small sack lunches. These sack lunches include 1 sandwich, 1

water, and 1 apple. His total cost is 8(s + 2).

• Cathy buys 4 medium sack lunches. These sack lunches do not include

water. Her total cost is 4(2s + 3).

Part 1

Dave buys 5 sandwiches for $31.25. Write an expression that can be used to find

the cost of x sandwiches. Show your work or explain your answer.

The expression that can be used to find the cost of x sandwiches is  6.25x.

Step-by-step explanation:

Given: Cost of 5 sandwiches = $31.25

To find : Cost of x sandwiches.

Cost per sandwich = ( Cost of 5 sandwiches) ÷ 5

= (31.25 )÷ 5

= $ 6.25

Cost of x sandwiches = (Cost per sandwich) × (x)

= 6.25x

Hence, the expression that can be used to find the cost of x sandwiches is  6.25x.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

step-by-step explanation:

mean or average is 40.6