Which of the following numbers must be added to complete the square in the equation below? x^2+6x-19=23 a. 19 b. -9 c. 3 d. 9

What is the greatest common factor of 6a, 8a^{2}, and 14?

Emma will roll two number cubes labeled 1 through 6. she will record the sum of the two numbers after each roll. she will roll the two cubes 540 times. how many times should emma expect the sum to equal 5?

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.