7th grade math help me please

22 ft

Step-by-step explanation:

We need to find the side of the square garden.

Area of square garden = 484 sq.feet

side²   = 484

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

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two