two line segments are parallel to each other. The first line segment has endpoint at (2, 3) and (1, 9). The second line segment has in points at (5, 4) and (3, y). What is the value of y?

16

Step-by-step explanation:

since they are parallel, they should have the same gradient

the gradient for first line is:

so gradient for second line is also -6

y-4 = -6×-2

y-4 = 12

y=12+4=16

check:

please mark brainliest

b

step-by-step explanation:

it have 5 sides and 5 identicle angle.the rest does not have the same property as b.

brainliest

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.