Answer:
D, It would be 1,385 Square Inches
Step-by-step explanation:
10(2x)+x
21x is the original number
12x is the reversed number
24x is the reversed then doubled number
Set up an equation:
24x=21x+9
3x=9
x=3
The original number is 63 and the reversed number is 36, which then is 72 when doubled.
A dimeter is any straight line that passes through the center of the circle so the answer is D.
9*2=18
36-18=18
18/2=9
the width is 9cm