3 years ago

Algebra question don't understand it

Mathematics

1 answer:

Stella [2.4K]3 years ago

7 0

Answer: B false

Step-by-step explanation:

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What value of x makes the function {(1,5), (x,8), (-7,9)} a function?

mestny [16]

X can be anything you want as long as it is not 1 or -7. If you have repeated x values with different y values, then it won't be a function.

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3 years ago

How do I solve for r b=1/6Rw

dusya [7]

<u>b = 1/6 r w</u>

Multiply each side by 6 : 6b = r w

Divide each side by 'w' : <em>6b / w = r

</em>

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A parabola intersects the x-axis at x=3 and x=9 what is the x-coordinate of the parabola's vertex?

KiRa [710]

Here we are given the x intercepts at x=3 and x=9

So let us try to make quadratic equation for this using given information.

We have factors in the form (x-a)(x-b)

where a and b are x intercepts given to us.

So rewriting in factored form:

$y=(x-3)(x-9)$

Now let us simplify it:

$y=x^{2}-12x+27$

Let us find the vertex now,

For a quadratic equation of the form:

$y=ax^{2}+bx+c$

For x coordinate , we have the formula,

$x=\frac{-b}{2a}$

So using this formula for our equation,

$x=\frac{-(-12)}{2(1)}$

So x = 6

Answer: The x-coordinate of the parabola's vertex is 6.

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3 years ago

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The hypotenuse of a right triangle is 1m longer than twice one of the other two sides. The third side of the triangle is 15m. Fi

Dimas [21]

Let the length of unknown side be x

So, hypotenuse = 2x + 1

By pythagorean theorem ie , a² = b² + c²

(2x + 1)² = x² + 15²

4x² + 1 + 4x = x² + 225

3x² + 4x -224

(3x +28)(x-8)

x = -9.33 , 8

Since, length can't be negative

x = 8

∴Unknown side length = 8 m

Length of hypotenuse = 2 x 8 + 1 = 17 m

Hope it helps now.

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PLLZZZZZ HELPPP!!!!!!

maks197457 [2]

Ms. Harris commission rate is 11.76 percent

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