Given the equation 4x + 2y = 9, which equation below would cause an inconsistent-independent system?

6x + 12y = 13
2x + y = −6
x − 2y = 7
8x − 4y = −5

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

What is the graph of the function fx x+2/x-3?