Answer:
Step-by-step explanation:
10x - 15y = 21
15y = 10x - 21
y = ⅔x - 7/5
slope of line is ⅔
slope of any perpendicular to line is -3/2
y = kx + k
slope of line is k
k = -3/2
What is the exact value of tan(−π4)? is 20
Answer:1696.46
V = π r 2 h
-6 because I did it on my calculator