What number must be added to the expression below to complete the square?

x2 - 18x

A. - 81

B. - 9

C. 81

D. 9

3 quarters equals how many dimes

Noah is making grilled cheese sandwiches for friends. He has 24 ounces of cheese. He plans to split the cheese evenly between 6 sandwiches. Write an equation to determine how many ounces of cheese, c, Noah can use on each sandwich.

A rectangular countertop has a perimeter of 24 feet. its area is 27 square feet. what are the dimensions of the counter?

Two trains leave stations 442 miles apart at the same time and travel toward each other. One train travels at 75 miles per hour while the other travels at 95miles per hour. How long will it take for the two trains to meet? Do not do any rounding.

How to solve systems of equation

What is the measure of angle n to the nearest whole degree

Angles that are located outside the triangle are called (blank) the sum of the exterior angles of a triangle is (blank) degrees what are remote interior angles?

How do you find the percent error of an estimate and the actual number

A line parallel to a triangle's side splits one side into lengths of 9 and 3. The other side is split into lengths of 12 and x. What is the value of x? (Enter the number only)

4.72 4.74 4.98 put than in lest to greatest