Wheels on some in-line skates can be removed using a 5/32 in. Allen wrench. What is 5/32
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multiply the ones in bracket by the L
T = 7× L + L × RS
T = 7L + LRS
making S the subject by transferring 7L to the left hand side of the equation.
thus
T - 7L = LRS
dividing through by LR
If each years cumulate an increase of 1100 dollars, then the cost after 22 years will be the base cost (27000) plus 22 increases (22*1100), for a total of
This relates to arithmetic series as follows: a series is arithmetic if, given a starting element , every next element is given by adding a fixed number, called common difference,
. So, the first terms are
So, you can see that the element is obtained by adding n times the common ratio to the starting element.
Since the element represents the cost after n years, we are interested in the element
As we had already calculated.