Question

Evaluate 1/3m -1-1/2n m =21 and n=12 thanks

Answer 1

Answer:

$\dfrac{-517}{504}=-1.0258$

Step-by-step explanation:

We are given an algebraic expression in two variables m and n as:

 $\dfrac{1}{3m}-1-\dfrac{1}{2n}$

Now we are asked to evaluate this algebraic expression at :

m=21 and n=12

Hence, putting the values of m and n in algebraic expression we get:

$\dfrac{1}{3\times 21}-1-\dfrac{1}{2\times 12}\\\\\\=\dfrac{1}{63}-1-\dfrac{1}{24}\\\\=\dfrac{-517}{504}\\\\=-1.0258$

Hence, the value of the expression is:

$\dfrac{-517}{504}=-1.0258$