The interior angles of a triangle must add up to 180 eighty degrees.
Since the ratio is 7:5:3, let's say that the three angles have degrees 7x, 5x, and 3x
7x+5x+3x = 15x = 180
-> x = 12
Therefore, the three angles are 7*12=84, 5*12=60, 3*12=36 degrees.
Answer: 300,408
If you add 300000+400+8 yout get 300408
Bottom left
Step-by-step explanation:x is not defined between 0 and 2 (there’s a definition for x<0 and another for x>=2) so there needs to be no y or x values between x =0 and x=2. This is only true for the bottom left
Answer:
2(x + 1)(2x + 1)
Step-by-step explanation:

Factor the trinomial in parentheses.
Since a - b + c = 0, use shortcut. One real root is -1 and the factor is (x + 1). The other root is: 
and the factor is 
Factor form of y:
y = 2(x + 1)(2x + 1)
Answer:
D and C
Step-by-step explanation:
I don't really know if my answers are even correct but I did some research on them. I don't want to waste your time --or mine.