Sara says "If you subtract 11 from my number and multiply the difference by -3 , the result is -54 ." What is Sara's number?

Statement given :

→Sara says "If you subtract 11 from my number and multiply the difference by -3 , the result is -54 .

To find :

SOLUTION :

Let us take Sara's Number be “x”.

★According to Question,

→ x - 11×(-3)= -54

→ x + 33 = -54

→ x = -54-33

→ x = (-87)

let's verify our number,and check whether it's correct or not !

x - 11×(-3)= -54

Putting the value of x

(-87) - 11 × (-3)= -54

(-87) + 33 = -54

(-54) = -54

Hence, The L.H.S. = R.H.S.

Thus,our number is Verified.

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