A common design for a mountain cabin is an A-frame
cabin. A-frame cabins are fairly easy to construct and
the steeply pitched roof line is perfect for helping snow
fall to the ground during heavy winters. Determine the
angle ( between the two sides of the roof of an A-frame
cabin if the sides are both 26 feet long and the base of
the cabin is 24 feet wide.

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 are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Simplify the expression. -2/5(10+15m-20n)