What is a value of this​

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

Acircle has a circumference of 28.36 units what is the diameter of the circle

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction