Which equations support the fact that rational numbers are closed under addition? Select each correct answer.

3√5+√5=4√5

√10 + (-√10) = 0

1/2 + 0.5=1

3√16 + 3√16=6√16

Kate reads books that were 240, 450, 240, 160, 165, 170, 180 pages long. What are the mean median and mode and which one describes the data set best?

Repeating tests usually leads to O more independent variables. O more accurate measurement. O more confidence in the results. o more controls in an experiment.

A circle is centered at (5, - 9) and has a radius of 12. Which of the following is the equation for this circle? A: (x - 5) 2 + (y + 9) 2 = 12 B: (x - 5) 2 + (y + 9) 2 = 144 C: (x + 5) 2 + (y - 9) 2 = 144 D: (x + 5) 2 + (y - 9) 2 = 12

Circumference of a circle is 6.25 what is the area

What is the volume of a cereal box that is 2 inches thick, 12 inches high and 10 inches wide?

Proportion n/11 = 40/55

The value of y varies directly with x, and y = 4 when x = 10. find y when x = 1. a.-2.5 b. 2.5 c. 0.4 d.-0.4

The height of a cylinder is 6 inches. The diameter of the circular base of the figure is 10 inches. What is the approximate surface area of the figure? Use 3.14 for π and round to the nearest whole number.

Navy sold a house for $225.900 and earned 4% commission how much did Macy earn for the sale of this house?

Y=-x^2+4 y=2x+1 I'm not sure how to solve for this system of equations