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Lydiac9243
16.09.2019 •
Mathematics
Aschool library charges a fine of 5 cents on the first day a book is overdue, then doubles the amount owed each day until payment is made. jada and juan each had a book that was overdue. jada paid a fine that was $2.40 more than juan’s fine. which statement about the overdue books is true?
jada’s book was overdue by 1 more day than juan’s book.
jada’s book was overdue by 2 more days than juan’s book.
jada’s book was overdue by 24 more days than juan’s book.
jada’s book was overdue by 48 more days than juan’s book.
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Ответ:
Option 2 - Jada’s book was overdue by 2 more days than Juan’s book.
Step-by-step explanation:
Given : A school library charges a fine of 5 cents on the first day a book is overdue, then doubles the amount owed each day until payment is made.
Jada and Juan each had a book that was overdue. Jada paid a fine that was $2.40 more than Juan’s fine.
To find : Which statement about the overdue books is true?
Solution :
First we convert $2.40 into cents
1 dollar = 100 sent
$2.40 = 2.40 × 100 = 240 cents
Let x be the amount overdue by Jada
Let y be the amount overdue by Juan
The equation form is :
By Jada the payment is![5(2)^x](/tpl/images/0234/1332/035cb.png)
By Juan the payment is![5(2)^y+240](/tpl/images/0234/1332/71518.png)
Jada paid a fine that was $2.40 more than Juan’s fine they were equal .
Therefore,
Now, we rewrite the RHS and LHS such that,
Comparing the coefficients of LHS with RHS
y= 4 and x-y=2⇒x=6
Therefore, the overdue days were x-y=6-4=2
Hence, Jada’s book was overdue by 2 more days than Juan’s book.
So, Option 2 is correct.
Ответ:
Step-by-step explanation:
Find JT:
Step 1:![3x+7=37](/tpl/images/2454/2596/a0c9c.png)
Step 2: Combine like terms.![3x=30](/tpl/images/2454/2596/6ea01.png)
Step 3: Divide 30 by 3x.![\frac{3x}{3} =\frac{30}{3}](/tpl/images/2454/2596/226f1.png)
Step 4: Finished.![x=10](/tpl/images/2454/2596/abb2a.png)