Complete the chart to find the mean, variance and standard deviation. remember to use commas and round numbers to the nearest tenth. x _ x _ x - x _ (x - x)2 1. 45 = -357.5 = the mean is 2. 340 = -62.5 = the median is 3. 400 = -2.5 = the variance is 4. 825 = 422.5 = the standard deviation is σ x = _ x = _ σ (x - x)2 = 310,225.2 n =

10

step-by-step explanation:

7+3=10

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4