15 plz if the diameter of the following circle is tripled, which of the following expressions could be used to find the area of the new circle? 9(254.34 in.2) 3(254.34 in.2) 9(1,017.36 in.2) 3(113.04 in.2)

10000000000000000000000000000000

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