Evaluate the expression for the given value of the variable(s).
-20 – 4b1a = -5, b = -1

−20−4b1a=−5=b=−15 4ab=−1=b=−15 4a

Step-by-step explanation:

yw

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

my guess is

step-by-step explanation: