90 + 20x + 10x = 180
30x = 90
x = 3
Area = Length x Height
Area = 5.4 x 5.4
Area = 29.16
Answer:

Step-by-step explanation:
(x+3)(x+3)
distribute the x to both three and x.
x * x + 3x * 3x
add like terms.
X^2 + 9x
Answer:
12
Step-by-step explanation:
Answer:
X=18.5
Y=37
Step-by-step explanation:
DOB=16° because it's a vertical pair. Because COF is 90°, that means 4x+16 is also 90.
4x+16=90, subtract 16
4x=74, divide by 4
x=18.5
Because EOA is 90°, and you know DOB is 16°, you can set 2y+16 equal to 90 as well.
2y+16=90, subtract 16
2y=74, divide by 2
y=37