Find the missing length. Round to the nearest tenth, if necessary.

The missing length is: 19.4

Step-by-step explanation:

according to pythagorean theorem, a^2 + b^2 = c^2

the hypotenuse is 21 and side and the short leg is 8

c²-b²=a²

21²-8²

441-64

377

take the square root of 377

it is 19.41

which rounds to 19.4

x=19.4

step-by-step explanation:

. your answer will contain x - and y -terms. (1 point) x ( ¿¿ 2 − 7 ) 2 +( y 2 − 9 ) 2 √ ¿ 12. what is the distance from the directrix (the crocodile river) to the point ( x , y )? write this equation. your answer will contain a y -term.