Find the length of the missing side. if necessary, round to the nearest tenth.

17.32 units

Step-by-step explanation:

The above triangle is a right-angled triangle understood by the small square which denotes the angle there is 90°

Using Pythagoras theorem for right-angled triangle,

b^2+10^2=20^2

or,b^2+100=400

or,b^2=300

or,b=10√3=17.32 units. [ANS]

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363