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vova2212 [387]
4 years ago
11

Is the Y value of the vertex of 4x squared plus 8X minus 8. help meee​

Mathematics
1 answer:
SIZIF [17.4K]4 years ago
8 0

Answer:

y = -12

Step-by-step explanation:

You first calculate the x coordinate using the equation x = \frac{-b}{2a}, which in this case is \frac{-8}{8} = -1.

Then plug that x value into the equation to get the y coordinate:

4(-1)²+8(-1)-8 = -12

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andreev551 [17]

Answer:

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Step-by-step explanation:

I haven't worked with absolute value inequalities in awhile, but let's take a wack at this.

We are given the following inequality:

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This implies two possible cases:

[1] -5 <= 2x -3

Or

[2] 2x - 3 <= 5

So let's solve x for both of these cases:

[1] -5 <= 2x - 3

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So from these cases, we can say the following is true:

x >= -1  and x <= 4

Thus, we can write this in the form

-1 <= x <= 4

Or in interval notation:

{ x is element of reals | -1 <= x <= 4}

Also written as

x is in the range [-1,4]

Where the closed brackets represent 1 and 4 as possible answers whereas parenthesis would imply they were not.

Cheers.

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