Four times the sum of a number and 15 is at least 120.let x represent the number. Find all possible values for x
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Answer:
The function is represented by .
Step-by-step explanation:
In this case, we must observe that total cost of the dog () is the sum of two components: i) <em>Fixed cost</em> (
) - Adoption fee, ii) <em>Variable cost</em> (
) - Daily cost of feeding the dog, both measured in US dollars.
In addition, we suppose that variable cost is directly proportional to the number of days that Kirstin owns her dog. That is:
Where:
- Number of days that Kirstin owns her dog, measured in days.
- Daily feeding costs, measured in US dollars per day.
If , then:
The function is represented by .
well, the subtotal or pre-tax bill is $23.50, now let's add the 8% tax and
so the post-tax bill is 23.50 + 1.88 = 25.38, and Jackie's tip is 20% of that