What number to add to the equation to complete the square x^2+4x=0

Olivia has $180 to buy presents for her 3 sisters and 2 nephews. She wants to spend $15 more on each sister than she spends on each nephew. How much does she spend on each sister?

an investment earns 5% simple interest. what amount of principal is need to have $2500 after 4 years? round your answer to the nearest cent

Which of the following items is the most likely to have a mass of 3 mg? A : Cat B : Pumpkin C : Ant D : Piano

Whats 9+10? how did you come up with your answer?

Write a numerical expression for the phrase "16 times the difference of 9 and 3." What operation should you perform first

Which addition problem has a sum thqt is an even number?

Use 1:100 to conveert to the real world

How many ways can 3 students be chosen from a class of 20 to represent their class at a banquet?

If 12 oz of honey costs 4.49 how much does 1 oz of honey cost

George worked on his science project for a total of 2 2/3 hours. He worked on it for 5/12 hour on Monday and 9/12 hour on Tuesday. He finished the project on Wednesday. How long did George work on his project on Wednesday?