Mr. lindsay wrote the four expressions below on the board.

expression one:
9 + 5x minus 5 + 3x
expression 2:
10x plus 3
expression 3:
x + 12
expression 4:
4(1+2x)

which expression is equivalent to 2x + 9 - x + 3? show your answer is correct by substituting a value for x.

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.