5x - 20y = 60...reduce by dividing by 5
x - 4y = 12
this is the same as the other equation....therefore, it is the same line...meaning infinite solutions
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y - 7x = -14
y = 7x - 14.....slope = 7, y int = -14
7y - 49x = -2
7y = 49x - 2
y = 7x - 2/7.....slope is 7, y int is -2/7
if the slopes are the same, but the y int are different, then u have a parallel lines with no solutions
8,16,24,32,40,48,56,65,73,81,88.....
9,18,27,36,45,54,63,72,81,90....
since 81 is the smallest number in both lists, it is the LCM
5 times (-17)= -85 so you should have said -85
The first one because they go up by 4 each time thus it is linear.
Hope this helps! :)
A) is the answer. The island in decaying by 10% each year, which means the amount will change within the period of the decay.
Hope this Helps! :)
