A builder wants to nail a 2 + foot extension to a board that is 7-9 feet long. How long will the board be after her
work? Express your answer in lowest terms.
A reasonable estimate for this problem is approximately feet.
A common denominator to use is
The board will be feet long.

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

On the first of each month, shelly runs a 5k race. she keeps track of her times to track her progress. her time in minutes is recorded in the table: jan 40.55 july 35.38 feb 41.51 aug 37.48 mar 42.01 sept 40.87 apr 38.76 oct 48.32 may 36.32 nov 41.59 june 34.28 dec 42.71 determine the difference between the mean of the data, including the outlier and excluding the outlier. round to the hundredths place. 39.98 39.22 0.76 1.21

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?