The answer is d
explanation: its right in between 50 and 60 making it 55, and the picture is showing it as an angle.
7. 65 + 75 = 140
180 - 140 = 40
( I think this is the answer)
Answer:

Step-by-step explanation:
x-7y = -49
i) move x to the right-hand side and change its sign
-7y = -49-x
ii) change the signs on both sides of the equation
7y = 49+x
iii) divide both sides of the equation by 7


iv) use the commutative property to reorder the terms
* commutative property: a+b = b+a

Answer:
2/3
r²
Step-by-step explanation:
Answer:
1. 2(x+3)
2.x-3
3.2(x-3)
4.2-3x
5.x2+3
6.3-2
7.3+2
8.3x-2
9.3/x
10.x/3
Step-by-step explanation: