2.9 * 5.1 is approximately 3 * 5 = 15 (actually 2.9 * 5.1 = 14.79)
14.3 x 12.8 is about 14 x 13 =182 (actually 183.04)
= -3x(20 +10) = -3x30
Looks to be in simplest form already to me !
= x(5+2)y3 = x7 y3
Mostly 'OK'......but I make a lot of typographical errors and have to make corrections. How do YOU do math?
h11/h9 = h(11-9) = h2
y = k/x (given)
yx = k
(6)(5)=k = 30
y (12) = 30
y = 30/12 = 2.5
arcos and cos cancel each other out and you are left with 7 R
7 Radians is equal to 7 - 2pi = .7168 R ( As this is reference angle -.7168 would give the same result)
Picture:
https://www.desmos.com/calculator/vxtm4fbbaa
b. slope = 9/4
using point -12 20 20 = 9/4 (-12) + b b = 47
y = 9/4 x + 47