2y-x=1 Are the points ( 0 , 1/2 ) and ( -7 , -3 ) solutions to the equation? ASAP

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.

What is the measure of ac? enter your answer in the box. (4x - 5.5) (5x+25)

Sade bought 21 1/2 lb. of ground beef. he used 1/4 of the beef to make tacos and 2/3 of the remainder to make quarter-pound burgers. how many burgers did he make?