A rectangular blanket for a child that measures 3 feet by 4 feet is made. A border that is exactly 6 square feet is to be created around the blanket. Which equations represent the required width of the border, x? Select all that apply A. (3+x)(4+x)=18 B. (3+2x)(4+2x)=18 C. (3+x)(4+x)-3(4)=6 D. (3+2x)(4+2x)=6 E. (3+2x)(4+2x)-3(4)=6

(4+2x)(3+2x) =18

Step-by-step explanation:

Given: A rectangular blanket for a child that measures 3 feet by 4 feet is made.

Area of border = 6 sq. feet

Area of rectangle = Length x Breadth

Then Area of blanket= 3 feet x 4 feet = 12 sq.feet

Combined area including border = 6 +12 = 18 sq. feet   (i)

Let x = width of border

New length = 4 +x+x = 4+2x feet

New breadth = 3+x+x = 3+2x feet

Combined area including border  = (4+2x)(3+2x)(ii)

From (i) and (ii), we get

(4+2x)(3+2x) =18 (Required equation)

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.