Answer:
2nd option
Step-by-step explanation:
Given
3x³ - 15x² - 4x + 20
step 1 ( group the first/second and third/fourth terms )
(3x³ - 15x² ) + (- 4x + 20)
step 2 ( factor each group )
3x² (x - 5) - 4(x - 5) ← note factor of - 4 ( not + 4 )
step 3 ( factor out (x - 5) from each term )
(x - 5)(3x² - 4)
For
, we expect
. Then recalling that
, we have

Then by definition of tangent,

Answer:
C
Step-by-step explanation:
Answer:
12/13
Sine is opposite over hypotenuse. The opposite side of U is 12 and the hypotenuse is 13, so the answer is 12/13
The triangle is an equiangular triangle so that means it must be an equilateral triangle.
3x - 3 = x + 8
2x = 11
x = 5.5
BC = 3(5.5) - 3
BC = 13.5