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

part a

in a city ice cream is mostly only bought when the temperature is very high as ice cream cools down our

so we can derive the conclusion that as the temperature increases the number of ice creams sold also increases

part b

y intercept is 5

slope is 2

happy to

pls mark as brainliest

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk