How is it possible to add two rational numbers and get a negitive number

Each week morning sunshine cafe orders coffee packets that costs $2.50 per packet with a 10.00 shipping fee. If morning sunshine Cafe does not want to spend more than $554.00 on coffee packets per week how many packets could they purchase

Carlos is heading a student council project to improve cafeteria meals. He surveyed all students who eat cafeteria lunches to find out which of the five weekly cafeteria options they like least.

A roller coaster holds a total of 30 passengers the ratio of males to females is 2:3. What are the linear equations required to get the answer?

A vending machine sells chips at $0.55 and candy at $0.75. Last month the vending machine yielded at $189.00 with the sale of 280 items. How many packages of chip were purchased last month?

Is the following conditional true or false? If it is true, explain why. If it is false, give a counterexample. If it is snowing in Dallas, Texas, then it is snowing in the United States.

12. Find the slope of (-6, 19), (-8,-4)

Juanita begins to factor an expression as shown. x2 + 3x - 18 = (x + ) (x - ) The numbers that should be placed in the boxes, from left to right, are .

Rewrite the quadratic function in the form that best reveals the zeros of the function: f (x) = 2 (2x^2+4x) + 3 f (x) = ?

There are 7 cars in an amusement park ride. There are 42 people in the cars. An equal number of people ride in each car. How many people ride in one car?

I'm confused and Pythagorean theorem him if you were given C squared how do you find A and B squared