Two airplanes are approaching the airport tower at the same altitude. radar shows that plane a is 20 miles due east of the tower and that plane b is 22 miles at 15° north of east. (see the drawing provided above).



how far apart are the two planes? round to the nearest hundredths.

answer: miles

answer:

54 -√2   (answer).

step-by-step explanation:

(7-2 square root) (8+2 square root)

= (7 - √2)(8 + √2)

= 7( 8 + √2) - √2(8 + √2)

=   56 + 7√2 - 8√2 - 2

= 54 -√2   (answer).

answer:

-11

step-by-step explanation:

let   a = ∣-4b-8∣+∣-1-b² ∣+2b^3

if b = -2 :   a =     ∣-4(-2)-8∣+∣-)² ∣+2(-2)^3

                a =   ∣8-8∣ + ∣-1-4 ∣ + 2(-8)

a = 0 + ∣-5 ∣ -16 = 5   -16 = -11