Question

Evaluate each expression for x = 2 and y = 5 3.) -4x^-2 + 3y^0 4.) 2x^0y^-2

Answer 1

Answer:

Step-by-step explanation:

x = 2  and y = 5

$3) -4x^{-2}* 3y^{0} = -4*\dfrac{1}{x^{2}}*3*1$             $[ y^{0} = 1]$

                        Now plug in x = 2

                   $= -4 * \dfrac{1}{2^{2}}= -4 * \dfrac{1}{4}$

                   = - 1

$4) 2x^{0}*y^{-2} = 2*1 * \dfrac{1}{y^{2}}= 2*\dfrac{1}{y^{2}}$

Now, plugin y= 5

                   $= 2 * \dfrac{1}{5^{2}}=\dfrac{2}{25}$