IDNLearn.com: Your reliable source for finding expert answers. Get accurate and detailed answers to your questions from our knowledgeable and dedicated community members.

the library sells 376 books at its annual used-book fundraiser. They take in a total of $2120. Childrens books cost $4, and adults books cost $7. How many childrens books did they sell?
Let c = number of childrens books sold, and let a = the number of adult books sold.

which system of equations can the librarians use to solve this problem?

A. 4c+7a = 376
c+a = 2120
a= 376-c
B. 7c+4a = 2120
a+c = 376
C. 4a+7c=2120
c+a = 376
D. 4c + 7a = 2120


Sagot :

[tex]Answer: \left\{\begin{array}{ccc}4a+7c=2120\\a+c=376\end{array}\right[/tex]