Y is directly proportional to the positive square root of (x+2)when x=7,y=9. Find y when x=23

15

Step-by-step explanation:

Given: y is directly proportional to when x = 7, y = 9

To find: y when x = 23

Solution:

u and v are said to be proportional if where k is a constant of proportionality.

As y is directly proportional to when x = 7, y = 9,

Put x = 7, y = 9

Put x = 23

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function

step-by-step explanation:

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