How do I show the work of twenty plus x plus forty five plus ninety

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

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Select all the correct locations on the table. consider the following expression. 76.493 select "equivalent" or "not equivalent" to indicate whether the expression above is equivalent or not equivalent to the values or expressions in the last column equivalent not equivalent 343 equivalent not equivalent 49 78.498 78.498 75.493 equivalent not equivalent 75.7 equivalent not equivalent