What do the brackets around a negative number mean

What is the historical estimate of beta for your stock? what is the range of the estimate with 67% probability? with 95% probability?

Use the geometric model to factor x^2-9

What is the simplest form of 4 12/20

A cube has a volume of 0.216 ft?. What is the length of each side of the cube?

What is the factorization of 15x^2+5x-50

Which unit rate is the lowest price a. 6oz of chocolate chips for $2.49

Jim and Tom collected empty soda cans to raise money. Jim collected 70 cans Tom collected 700 cans the number of cans Tom collected is how many times greater than the number of cans Jim collected?

Graph the system. What is the solution and what does it represent

Solve x2 = 12x - 15 by completing the square. Which is the solution set of the equation? A ... (-6-square root of 51,-6 + square root of 51) B ... (-6 - square root of 21,-6 + square root of 21) C ...

The product of two numbers is 4235. If one number is 7, find the other number