Avideo game has 3 villains who pop up at different times one villain comes up every 5 seconds a second villain comes up every 10 seconds a third villain appears every 16 seconds find the lcd (least common denominator) of 5, 10 and 15 to determine how much time will pass before 3 villains appear at the same time answer soon this counts for 60% of my grade

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

Using elimination, what is -4x+2y=-12 4x+8y=-24

What are two numbers that have a sum of 15