9. An adult discount ticket to the amusement park costs $35 and a child discount ticket cost $22. A group of 50 friends purchased adult and children's tickets and paid $1334. How many discount tickets for (a) children and (b) adults were purchased?

Engr. Janry Garcia and Engr. Caroline Moncada is working on a project for a newly constructed 4-story building. The project is regarding CCTV installation. As project engineers, they need to assess and make an inventory of the primary materials to be installed in the building. The following primary materials give the merchandise with its corresponding price list. C=CCTV Camera worth P5000 each; W=Cable wires P100 per meter; S=Splitters worth P50 each and B=Balun and Connectors for P150. Each of the materials should be distributed depending on the number of units per floor. For the 1st floor: twice the number of CCTV cameras is needed, three times the length of cable wire is required, four times the number of splitters and five times the number of baluns and connectors less is necessary, which gives an acceptable loss of -60dB. For the 2nd floor: 6 times the number of CCTV cameras are required, seven times the length of cable wire is needed, eight times the number of splitters less and…

1. The student council bought pizza for $900 to sell at the dance. They kept 10 pizzas to feed the grade reps after the dance and sold the rest for $1040. There were 8 slices in each pizza. Their profit was 50 cents a slice. How many pizzas were in the original order?

5. Brady and 3 friends went to lunch at Mazzio's Pizza. Their meal cost $32, and they left a 15% tip. How much was the total bill, including tip?