For the entirety of this problem, let A=(1,5,1)A=(1,5,1), B=(7,8,3)B=(7,8,3), and C=(-2,4,1)C=(−2,4,1). a) (9 points) Find the area of triangle ABCABC. b) (5 points) Find the equation of the plane containing triangle ABCABC. Write your answer in the form ax+by+cz=dax+by+cz=d. c) (9 points) Determine the acute angle made by the plane you found in part (b) and the xzxz-plane. You may leave your answer in terms of an inverse trig functions.

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)  

it should be a.

hope it

a

step-by-step explanation:

22, 28, 34, 40, 46

b)   f(n) = 6n + 16

n = what is the number of the row ( 22 would be row 1) so if we replaced n with 1, we would get 22

c)   the 14th row will have 100 seats

(1)   (2)   (3)   (4)   (5)   (6)   (7)   (8)   (9)   (10) (11) (12) (13) (14)

22 | 28 | 34 | 40 | 46 | 52 | 58 | 64 | 70 | 76 | 82 | 88 | 94 | 100