Answer:
the first one
8x+5
Step-by-step explanation:
10x-2-2x+7= 8x+5
The cost of one sandwich is $5.7
<h3>How to determine the cost of one sandwich?</h3>
The given parameters are:
Order = 3
Tax = 8% off
Total cost = $20.66
Tip = $5
The cost of one sandwich is calculated as:
Total cost = Order * Cost of One (x) * (1 - tax) + Tip
This gives
20.66 = 3 * x * (1 - 8%) + 5
Subtract 5 from both sides
15.66 = 3 * x * (1 - 8%)
Make x the subject
x = 15.66/[3 * (1 - 8%)]
Evaluate
x = 5.7
Hence, the cost of one sandwich is $5.7
Read more about sales tax at:
brainly.com/question/1700984
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Answer:
15.9778
≈ 16
Step-by-step explanation:
Formula= a² + b² = c²
7.7² + 14² = 255.29
√255.29 = 15.9778 or ≈16