Describe different ways that you can show a story problem. use one of the problems in this lesson as your there were 21 children in thelibrary .after 7children left the library, how many children were still in the library?

Total 14 children were still in the library

Step-by-step explanation:

The total number of students in a library is 21. After that 7 children left the library.

If x children arrive in the library, the number of  students in the library are increased by x. It means we have to add x units to the total number of students in the library.

If y children left the library, the number of  students in the library are decreased by y. It means we have to subtract x units from the total number of students in the library.

Since the 7 children left the library, therefore the number of students reduced by 7.

Therefore 14 children were still in the library.

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)