If using the method of completing the square to solve the quadratic equation x^2+8x-4=0 which number would have to be added to "complete the square"? I need the answer ASAP. Please help. Thank you

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?

If w = 6 units, x = 3 units, and y = 5 units, what is the surface area of the figure? 168 units2 240 units2 144 units2 96 units2

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi