Answer:
is there a picture or something
Step-by-step explanation:
or like some equation? Im in 7th grade too but i need a picture in order to help you So when u get a picture i edit my anwser and help you
Answer:

Step-by-step explanation:

hope this helps
brainliest appreciated
good luck! have a nice day!
A angle that is 171° will be in the 2nd quadrant
Answer:
a = 10
Step-by-step explanation:
From the solution given, x = a and y = -1
Substitute for x and y in either of the equations
y = -x + 9
-1 = -a + 9
a = 9 + 1 = 10
Answer:
2KClO3=2KCl+3O2. It is now balanced