How to you plus negative numbers

2+2 = x? i dont understand this

A combination lock requires a user to select three numbers to unlock it, where all three numbers are between 1 to 30, inclusive. What is the probability someone can guess the correct combination given 100 attempts?

Solve using substitution. y = - 2 7x - 4y = 1

The vertices of a triangle are listed below. K (-2, 2), L (2, 2), M (0, - 3) What is the area of the triangle?

Express 0.96 as an percent

Maleeyah and Bella bought 1/2-pound of nuts. They are sharing the nuts equally. How many pounds of nuts will each girl get?

Calculate the value of the expression 3.2 (2)

Five siblings have a combined age of 195 years the oldest is 13 years older than the youngest mark the middle child and it's five years younger than Josie the other two siblings are six years apart if the second oldest child is 42 what are the ages

Give an example of two fractions whose sum can be simplified to 1/2

What is the result when the number 24 is decreased by 3.3%