[問題]GWD 12-35

[benetracy]

Q35:
The total charge to rent a car for one day from Company J consists of a fixed charge of $15.00 plus a charge of $0.20 per mile driven. The total charge to rent a car for one day from Company K consists of a fixed charge of $20.00 plus a charge of $0.10 per mile driven. Is the total charge to rent a car from Company J for one day and drive it x miles less than $25.00 ?
(1) The total charge to rent a car from Company K for one day and drive it x miles is less than $25.00.
(2) x < 50

答案是D 我不懂的是(1) 謝謝

[JS]

(1) The total charge to rent a car from Company K for one day and drive it x miles is less than $25.00

20+0.1X<25
0.1X<5
x<50

[benetracy]

我瞭了 多謝

[jerry7271]

想請教幾個問題，這題我選E。
從(1)可得出X<50；(2) X<50，
但代入題目所問的
is Company J for one day and drive it x mile
less than 25.00?
從x<50代入式子(15+0.2X)結果有可能是大於25，
也有可能是小於25。
這樣答案不就是E嗎？ 我觀念錯了嗎？

[scujean]

題目問：15+0.2*X<25嗎→移項→X<50吗..

[jerry7271]

我懂了，謝謝您的回應