The average of 8 and x = 3. What is x?

x= -2

Step-by-step explanation:

The average of 8 and x

(8+x)/2

is 3

(8+x)/2  = 3

Multiply each side by 2

(8+x)/2 *2  = 3*2

8+x = 6

Subtract 8 from each side

8+x-8 = 6-8

x = -2

1,589.63 in.^3

step-by-step explanation:

i hope this you : d

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