Answer: can't add an answer, but for the first all 3 angles add up to 180 in a triangle for the second, plug 5 in and also check if all three add up to 180
Step-by-step explanation:
Answer:
8.1 g/cm
Step-by-step explanation:

I'm confused too but that what i got
Answer:
c, 4/3
Step-by-step explanation:
you need to isplate y so subtract 5 from both sides then divide both sides by 3, the coefficient of x is now 4/3 and x coefficient is the slope