Pls help
will give the brainliest!
Urgent!!
need explanation.

a)

The rotation transformations are:

where $(x', y')$ are new coordinates.

Since we want an anti-clockwise rotation of the axes, put $\theta= 90$° to get the required coordinates as $(4,-1)$

b)

The equation of the given line is $x-y=0$

Use the mirror formula:

Replace $x$ by $y$ above to get the corresponding formula for the y-coordinate.

Here we have

$a=1$

$b=-1$

$c=0$

$x_o= 1$

$y_o =4$

Substitute these values to get the required coordinates as $(4,1)$

c)

$(5,3)$ maps onto $(1,1)$

Let's keep it simple here: To get the new coordinates you subtract 4 from the x coordinate and 2 from the y coordinate.

Thus for our point $(1,4)$ our image is $(1-4, 4-2)$ which is $(-3,2)$

well what you have to do is divide 84 by 6 so theanswer

step-by-step explanation:

84 divided by 6 = 14

and that lightbulb changing party must be freaking lit!

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.