Answer:
-35
Step-by-step explanation:
9m+7n
m=-7
n=4
Plug the numbers into the equation
9(-7)+7(4)
-63+28
=-35
From 1-60, 4 and 6 a few common multiples. Find those multiples, which are
12, 24, 36, 48, 60.
So in 60 seconds, they blink together 5 times.
Answer:

Step-by-step explanation:
Know:
= 
---> 
---> 
---> 
Simplify
---> =