If a = 9 and c = 20, the measure of ∠B = degrees (to the nearest tenth).

A) 24.2
B) 26.7
C) 63.3
D) 65.8
E) 68.2

63

Step-by-step explanation:

cos(B) =  

adj

hyp

cos(B) =  

9

20

thus,

B = cos-1 (

9

20

)

B = 63.26

in geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. by extension, a line and a plane, or two planes, in three-dimensional euclidean space that do not share a point are said to be parallel.

x^3-4x^2+3x-2/x^2+1

step-by-step explanation:

factor the numerator and denominator and cancel the common factors