If is the matrix product
and is the entry of
in the second row and third column, then
That is, the 2nd row, 3rd column entry of is the product of the 2nd row of
and the 3rd column of
.
if a bag contains 400 coins,and 33 1 over 2 are nickels, how many nickels are there what percent of the coins are not nickels
2 answers:
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Replace f(x) with y and proceed to make x the subject:
y=2x-10
y+10=2x
y+10/2=x
Now swap y with x and replace the isolated x with f(x), so
y=2x-10
y+10=2x
y+10/2=x
Now swap y with x and replace the isolated x with f(x), so
