Answer: I think it is the last question
Step-by-step explanation:
Answer:
D
40
2x+100=180
-100 -100
2x =80
/2 /2
x =40
Answer:c
c = 5
a²+b²=c²
(3)²+(4)²=c²
9+16=c²
25=c² square root on both sides
5=c
c=5
