Answer:
1, 2, and 3
Step-by-step explanation:
z = -5
3(0.7z + 2.8) = 7(1.5z + 7.2)
2.1z + 8.4 = 10.5z + 50.4
2.1z - 10.5z = 50.4 - 8.4
-8.4z = 42
z = 42/(-8.4)
D. 4
x=2, y=4 on the graph
Therefore, f(2)=4
~
Hope this helps!
Answer: 90 degree angle
if im wrong let me know please
