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

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).