Answer: x = 9
Mel's mistake was in the last step, she multiplied by 2 instead of dividing by 2
Step-by-step explanation:
2x + 1 = 19
Subtract 1 from each side
2x = 18
Divide by 2
x = 9
I believe your answer is 4 4/9 as a mixed fraction but it can also be 40/9. Hope this helps :)
The area of a square can be found by squaring the side length. So, the area of the picture can be found by multiplying 16 by 16. 16 x 16 is 256.