Find the x-value at which y=2x+5/x-3 is undefined.

y is undefined where the denominator is zero, since division by zero is undefined.

So, where is (x-3) zero?

so x would = 3?

To find the x-value at which the expression y=(2x+5)/(x-3) is undefined, we need to identify the value(s) of x where the denominator is equal to zero, as division by zero is undefined.

In this case, the denominator of the expression is x-3. Therefore, to find the x-value(s) where the expression is undefined, we need to solve the equation x-3=0.

Solving for x, we add 3 to both sides of the equation:

x - 3 + 3 = 0 + 3
x = 3

Hence, the x-value at which the expression y=(2x+5)/(x-3) is undefined is x=3.