If I spend 40$ on 5 pounds on concrete. What is the unit rate in dollars per pound I need the answer and please explain how unit rate works cause I don't know lol

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.