Which equation represents a linear function

A.

Step-by-step explanation:

The equation that is a linear function  can be written in the form

For the first option, we have;

Expand;

y=-5x+12

This is a linear function.

For the second option, we have;

Expand;

x+4x=-32-7

5x=-39

This is a constant function.

for the 3rd option, we have;

Expand;

This is not linear because of the xy term

The last option is

this is quadratic.

its 69.420

step-by-step explanation:

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.