Which expressions are equivalent when m=1 and m=4? (picture attached)
2 answers:
Answer:
Option 2 is correct.
Step-by-step explanation:
Given the expressions
we have to choose the option for which the expressions are equivalent when m=1 and m=4.
The substitution of values shown in table in attachment.
The only option 2 which gives the same values for m=1 and m=4 in both the expressions.
∴ Option 2 is correct.
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Answer:
It will take 60 seconds for the signs to light up at the same time again.
Step-by-step explanation:
Given:
One sign lights up every 10 seconds
One sign lights up every 12 seconds
They have just lit up at the same time.
To find in how many seconds will it take for the signs to light up at the same time again.
Solution:
In order to find the time in seconds will it take for the signs to light up at the same time again, we need to find the least common multiple of the the times for which the given signs light up.
The numbers are 10 and 12.
To find the LCM, we will list the multiples of each and check the least common multiple.
The multiples of 10 and 12 are :
thus, we can see that 60 is the least common multiple.
Thus, the signs will light up at the same time time after every 60 seconds.