What is 18 X 19 i cants figure it out
2 answers:
Answer:
WE can do it in many ways, one is this.
We can write 19 and 18 as 20-8 & 20-1
So we can make it like this:-
(20-2)*(20-1) <em>THIS CAN BE SOLVED BY USIND THE IDENTITY OF</em> <em>(x+a)(x+b)=</em><em>+(a+b)x+ab</em>
<em>Here x=20</em>
<em> a=-2</em>
<em> b=-1</em>
So,
<u>20^2+ (-2+-1)20+(-2*-1)</u>
<u>= 400+(-2-1)20+ (-2*-1)</u>
<u>= 400+(-3)20 +(-2*-1)</u>
<u>= 400+ -60 + (2)</u>
<u>= 400 - 60 + 2</u>
<u>= 340+2</u>
<u>= 342</u>
So 18*19=342
And if you are of lower grades follow this method.
Multiply 18 with 20, you will get 360
Now subtract 18 from 360.
WHAT I DID HERE IS ESTIMATED 19 AS 20 AND THEN SUBTRACTED A 18 FROM THE RECEIVED PRODUCT TO PREVENT CHANGE IN VALUE
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Answer:
or
Step-by-step explanation:
step 1
Find the slope of the line parallel to the given line
we know that
If two lines are parallel, then their slopes are the same
we have
therefore
The slope m of the line parallel to the given line is
step 2
Find the equation of the line in point slope form
we have
substitute
----> equation of the line in point slope form
step 3
Find the equation of the line in slope intercept form
we have
Isolate the variable y
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