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Vilka [71]
4 years ago
13

A sweatshirt originally priced at $28.00 is on sale for $22.00. What is the percent of decrease, rounded to the nearest whole nu

mber? A. 18% B. 21% C. 24% D. 27%
Mathematics
1 answer:
Masteriza [31]4 years ago
7 0

Answer:

B 21%

Step-by-step explanation:

Decrease = original price minus new price

divide the decrease by the original amount and then multiply by 100.


decrease = 28-22.  Decrease = $6

6/28 = .2142857

.2142857 x 100 = 21.42857%

21.42857% rounded = 21%

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4 years ago
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3 years ago
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Answer:

\Large \boxed{\sf \ \ f^{-1}(x)=x^2-3 \ \ }

Step-by-step explanation:

Hello,

\text{For }x+3\geq 0\\\\f(x)=\sqrt{x+3}\\\\x=(fof^{-1})(x)=f(f^{-1}(x))=\sqrt{f^{-1}(x)+3}\\\\\text{*** take the square ***}\\\\f^{-1}(x)+3=x^2\\\\\text{*** subtract 3 from both sides ***}\\\\\large \boxed{\sf \ \ f^{-1}(x)=x^2-3 \ \ }\\

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

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