You can
put this solution on YOUR website!problem#10
simplify each complex fraction
(w+3)/(4w) divided by (w-3)/(2w)
Remember when you divide fractions, you invert the dividing fraction & multiply:
:
*
:
Cancel the 2w into the 4w and you have:
*
=
about as simple as you can get it.
:
:
Problem #28
fungicides account for (1)/(10) of the pesticides used in the United States. The ratio of fungicides to insecticides used in the United States can be written (1)/(10) divided by (1)/(4). Write this ratio in simplest form.
:
Invert and multiply by the dividing fraction;
*
=
=
:
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Problem #32
The combined resistance of two resistors R1 and R2 in a parallel circuit is given by the formula
Rt = (1)divided by (1)/(r1)+ (1)/(r2)
simplify the formula.
Rt =
:
Put the dividing fractions over a single denominator:
Rt =
:
Invert the dividing fractions then multiply by 1 and you have;
rt =
:
The very familiar "product over sum" equation for 2 resistors in parallel.
