Answer:
An average of 60mph.
Step-by-step explanation:
The average is the mean.
(50 + 70)/2 = 60
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Answer:
3
Step-by-step explanation:

4*3=12
3*4=12
12/4=3
12/3=4
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Answer:

Step-by-step explanation:
move variable to the right-hand side and change its sign

divide both sides of the equation

−5 < a − 4 < 2
+4 +4
-1 < a < 6
Answer is B. The second one