Question

If x= -5 what will the value of y be if y equals 4 - x2​

Answer 1

SOLVING

`\Large\maltese\underline{\textsf{A. What is Asked}}`

If x=-5, what is y is y=4-x²?

`\Large\maltese\underline{\textsf{B. This problem has been solved!}}`

Put in the value of x.

`\bf{y=4-(-5)^2}` | evaluate using Bodmas

`\bf{y=4-25}` | subtract

`\bf{y=-21}`

`\cline{1-2}`

`\bf{Result:}`

`\bf{=y=-21}`

`\LARGE\boxed{\bf{aesthetic \\ot1 \theta l}}`

Answer 2

The number that could not be a value of y if y = 4x² - 6 is -12.

Explanation:

What is the value of y for a function of f(x)?

The value of y for which a function f(x) = y = 4x² - 6 can be determined by knowing the smallest value of y for which x is equal to zero.

So, from the equation y = 4x² - 6, we will replace the value of x with zero to determine the smallest value of y.

y = 4(0) - 6

y = 0 - 6

y = -6

Thus, any number smaller than -6 could not be a value of y for the equation y = 4x² - 6.

Therefore, we can conclude that the number that could not be a value of y if y = 4x² - 6 is -12.