Identify the cross section of the solid shown in the diagram.
A. octagon
B. hexagon
C. quadrilateral
D. pentagon

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?

Given the equation    = 5, solve for x and identify if it is an extraneous solution