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

Step-by-step explanation:

You can eliminate the equations that contain irrational numbers (√5, √10). Those that are left involve addition of rational numbers.

step-by-step explanation:

|ab| = 1.4 = 4

h = 1.4 = 4

a(abc) area = 4.4 = 16/2 = 8

area of abc = 8 cm^2

good luck ! ; )

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.