3 feet 5 feet
4 feet
What is the surface area of the outside of the box?
A. 24 ft2
74 ft2
С
60 ft2
D
94 ft2

D

94

Step-by-step explanation:

Formula

SA = 2L*W + 2L*H + 2*W*H

Givens

L = 5 feet

W = 3 feet

H = 4 feet

Solution

SA = 2*5*3 + 2*5*4 + 2*3*4

SA = 30 + 40 + 24

SA = 94 ft^2

D

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.