Pwease answer as soon as possible : 3

I think the answer is 10???

Step-by-step explanation:

you can use the formula pq/2 where p is the horizontal length and q is the vertical length. Then you do 2(10)/2. This is 20/2 which becomes 10 sq units. Correct me if I am wrong though

30005

yes ok                                            

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