Aclass of 25 students is trying to find the mean weight of the students in the class. if the sum of all the students' weights is 2,946 pounds, what is the mean weight rounded to the nearest pound? 110 pounds 117 pounds 118 pounds 125 pounds

118 lbs

Step-by-step explanation:

to find the mean weight, we need to divide the sum by the number of people. 2946/25 is approximately 118 pounds.

answer:   14

step-by-step explanation:          

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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