How do you solve negative numbers?

A bookstore has a sale on travel books. Customers can purchase one book for the full price of $18.50 and then as many other travel books as they want for half of that price.

What is the fraction of 12%

A student bought a truck with a down payment of 4000 and monthly payments of $250 for four years. What was the total cost of the truck

How many neighboring countries does china have

Assume that random guesses are made for seven multiple choice questions on an SAT test, so that there are n=7 trials, each with probability of success (correct) given by p = 0.2. Find the indicated probability for the number of correct answers.

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.