일차방정식 연습문제 — OpenStax Prealgebra · 6.3절 · 1번

OpenStax Prealgebra · 6.3절 · 1번우리말 번역

캐시는 판매세율이 구입 가격의 $6.5\%$ 인 워싱턴에서 자전거를 샀습니다. 자전거의 구입 가격이 $\char36 392?$ 일 때 다음을 구하세요.

영어 원문 보기

Cathy bought a bicycle in Washington, where the sales tax rate was $6.5\%$ of the purchase price. What was

ⓐ the sales tax and
ⓑ the total cost of a bicycle if the purchase price of the bicycle was $\char36 392?$

정답·풀이 보기

원본 교재 풀이(영어)


ⓐ
Identify what you are asked to find.	What is the sales tax?
Choose a variable to represent it.	Let $t=$ sales tax.
Write a sentence that gives the information to find it.	The sales tax is 6.5% of the purchase price.
Translate into an equation. (Remember to change the percent to a decimal).
Simplify.
Check: Is this answer reasonable?
Yes, because the sales tax amount is less than 10% of the purchase price.
Write a complete sentence that answers the question.	The sales tax is $25.48.


ⓑ
Identify what you are asked to find.	What is the total cost of the bicycle?
Choose a variable to represent it.	Let $c=$ total cost of bicycle.
Write a sentence that gives the information to find it.	The total cost is the purchase price plus the sales tax.
Translate into an equation.
Simplify.
Check: Is this answer reasonable?
Yes, because the total cost is a little more than the purchase price.
Write a complete sentence that answers the question.	The total cost of the bicycle is $417.48.

한 번 더 — 비슷한 문제OpenStax Prealgebra · 6.2절 · 1번우리말 번역

식으로 나타내어 푸세요: $x$ 의 $\frac{3}{4}$ 은 $24.$

답 쓰고 채점

다 풀었으면 정답 확인

$32$

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