Please help need answer fast !!

79

Step-by-step explanation:

equation:

18x - 8 + 11x = 20x +19

Add like terms:

29x - 8 = 20x + 19

add 8 to both sides:

29x = 20x + 27

subtract 20x from btoh side:

9x = 27

Divide both sides by 9:

x = 3

substitute x into the equation for SU

SU = 20(3) + 19

Solve:

SU = 79

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a