Answer:

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Work Shown:

You could expand terms out and simplify, but I think it's more handy to leave it in this form so you can easily spot the center and radius from a glance.
Answer:
x=71
Step-by-step explanation:
38+x+x=180
x+x=142
2x=142
x=71
The answer is 28.67 with the tax rate and total amount
Her father will owe her $10.50 because you have to multiply .25 (The amount of a quarter) and 17 which will give you $4.25. Once you do that you have to multiply .25 and 25 to give you $6.25 and when you add those together you get $10.50