4. What is 54 + (-78) - (-39)
1 answer:
Answer:
Step-by-step explanation:
follow the Pemdas order of operations
add and subtract (left to right)
apply the rule +(-a)=-a
+(-78)=-78
=54-78-(-39)
54-78=-24
=-24-(-39)
apply the rule -(-a)=+a
-(-39) =+39
=-24 +39
-24+39=15
=15
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Answer:
6. B) 115
7. B) 180 - (180 - 90 + 30) = x
Step-by-step explanation:
Answer:
87
Step-by-step explanation:
Do what's inside the paranethesis first
2+(9*3)=2+27=29
29*3=87
The answers are 0 and 2
This can be found by looking at the x axis and finding every point where the line crosses
5 = c. infinite.
6 = I don't know. sorry!!
Hope this helps!!
Y=-3x+36 because the line crosses the y axis at 36
