Solve the inequality: (x+3) (x-4) <-12

N[A*B] in SET theory means?

Y and x have a proportional relationship, and y = 7 when x = 2. What is the value of x when y = 21?

Which of the following represents an arithmetic sequence? The temperature rises one degree the first hour, 2 degrees the second hour, 4 degrees the third, and so on.

Claudia works as a manufacturer of decorative jewelry boxes. A customer would like her to create some boxes with the following conditions: The sum of the length and width must be 30 centimeters. The height must be 3 centimeters less than the length.

Mr Obrien is paid 7.30 per hour for the first 40 hours he works in a week. He is paid 1.5 times that rate for each hour after that. Last week he worked 44 hours. He said he earned 321.20 last week. Do you agree? Support your answer.

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.