Question

-2x^3 - 10y-7 evaluate if x = 4 and y = -9

Answer 1

We are given the following expression:

`-2x^3-10y-7`

We are asked to evaluate the expression in the following points:

`\begin{gathered} x=4 \\ y=-9 \end{gathered}`

To determine the value of the expression we will substitute the value in the expression like this;

`-2(4)^3-10(-9)-7`

Now, we solve the exponents:

`-2(4)^3-10(-9)-7=-2(64)-10(-9)-7`

Now, we solve the products:

`-2(64)-10(-9)-7=-128+90-7`

Solving the operations:

`-128+90-7=-45`

Therefore, the numerical value is -45