Find the surface area.

196

Step-by-step explanation:

Surface are of 2 rectangles = 2(2*4) = 16

surface are of the base rectangle = 4*3 = 12

Area of tow triangles =2( * 2* 2)= 4

total = 16+12+4

= 196

about 0.75 hours

step-by-step explanation:

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.