Which sets of numbers are closed under addition?

choose all answers that are correct.

a.
{0, 2, 5, 8}

b.
even integers

c.
rational numbers

d.
{0}
plzz ?

Read the equations in the table below. then drag a description of the situation and a table to represent each equation. indicate whether each of the relationships is proportional or non-proportional.

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.