Find the area of the shaded part of the figure below

70 cm^2

Step-by-step explanation:

Multiply (20x8)/2 to find the area of the triangle.  Then subtract the area of the rectangle(10 cm^2) from the area of the triangle to get your final answer.

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116