Answer:
4 days
Step-by-step explanation:
first convert 1/4 to eighths
2/8=1/4
to make 2/8 equal 7/8
you have to multiply by 4 for it to be 8/8
it cant be 7/8 because that would be three and a half days and they only read 1/4 each day
so it would take 4 days to finish
Answer:

Step-by-step explanation:
We can solve this system just by summing each side of the equation:
So, both left sides will be sum, and both right sides too.
The resulting expression will be:

Ordering and solving both sides:

Hence, the value to the system is 
It's important to combine both equation, because the exercise is asking for the solution of the system.
Answer:
85 notes
Step-by-step explanation:
2 coins : 5 notes
1 coin : 2.5 notes
34 coins : __ notes
^
I
I
(multiply by 2.5 to get amount of notes)
<span>LCM(7,18,21) </span>Least Common Multiple is :<span> 126 </span>
Calculate Least Common Multiple for :
7, 18 and 21
Factorize of the above numbers:<span> 7 = 7
<span> 18 = 2 • 32 </span>
<span> 21 = 3 • 7 </span></span>