Answer:
Step-by-step explanation:
Given
Required
What is l when S = 725
This can be solved using Sum of n terms of an AP;
Where
To get T1; we substitute 4 for k in 2k - 3
To get Tn; we substitute l for k in 2k - 3
n = the number of terms;
Since k = 4 to l, then
Substitute these values in
Collect Like Terms
Open the bracket
Subtract 725 from both sides
or
or
But l must be positive;
Hence,
Step-by-step explanation:
Take the L.C.M of 2 & 5. It's ' 10 '. Firstly find out the factors of 2 [ i.e 1 × 2 ] and then secondly find out the factors of 5 [ i.e 1 × 5 ]. Now , Note that while finding L.C.M of any numbers, Common numbers & Remaining numbers must be multiplied. In our case , common number = 1 & Remaining numbers are 2 & 5. Multiply them : [ 1 × 2 × 5 = 10 ].
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Subtract 2x from 5x :
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Apply cross product property :
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Here, We have to think about how to remove the coefficient 3. For that , Divide both sides of the equation by 3.
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Hope I helped ! ♡
Have a wonderful day / night ! ツ
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Answer:
Nine hundred fifty-four thousandths.
Step-by-step explanation:
Answer: x^2-5x-84
Step-by-step explanation:
(x+7)(x-12)=
x*x+(-12*x)+7x+(-84)=
x^2-12x+7x-84=x^2-5x-84