Question

Plz Help!!! FInd "B" I'll give brainliest

Answer 1

Answer:

b = 45/4

Step-by-step explanation:

First we need to solve for x

sin 30 = opposite/ hypotenuse

sin 30 = x/15

15 sin 30 = x

15 (1/2) =x

15/2 =x

Then we can use

cos 60 = adjacent/ hypotenuse

cos 60 = a/x

Multiply by x

x cos 60 =a

15/2 (1/2) =a

15/4 =a

b = 15 -a

b = 15 - 15/4

b = 15*4/4 - 15/4

  = 60/4-15/4

  =  45/4

Answer 2

Answer: b=11.26

Step-by-step explanation:

using the length 15 solve for the lengths z and x because the big triangle is also a 30 60 90. x=7.5, z=12.99 (13). Once you know z you can solve for y and b. y=6.5 and b=11.26.