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3 years ago

If x° – 7x2 + kx + 15 is exactly divisible by (x – 3), then find the value of k.

Mathematics

1 answer:

faltersainse [42]3 years ago

3 0

Answer:

k=4

Step-by-step explanation:

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Help pls will give 10 points

patriot [66]

Answer:

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Step-by-step explanation:

I hope that it's a clear explanation.

4 0

3 years ago

Factor the following: x^2+12x+32

barxatty [35]

Answer:

(x+4)(x+8)

Step-by-step explanation:

when you use the FOIL method then you can check the work and make sure that this is correct.

4 0

3 years ago

Which is the slope-intercept form of the equation of a line that passes through (5,-4) and has a slope of 3/4

Andreas93 [3]

Y = mx +b whre m is the slope and b is the y-intercept.

We have the slope 3/4 so put that instead of m

y = 3/4x + b

Now to find the y-intercept (b), plug the ordered pair in and solve for b.

-4 = 3/4 * 5 + b
-4 = 15/4 + b
-31/4 + b

So y = 3/4x - 31/4

4 0

4 years ago

4/x-1+6/x+1=-12/x^2-1

Mademuasel [1]

$\frac{4}{x - 1} + \frac{6}{x + 1} = \frac{-12}{x^{2} - 1}$

$\frac{4(x + 1)}{(x - 1)(x + 1)} + \frac{6(x - 1)}{(x - 1)(x + 1)} = \frac{-12}{x^{2} - 1}$

$\frac{4x + 4}{x^{2} - 1} + \frac{6x - 6}{x^{2} - 1} = \frac{-12}{x^{2} - 1}$

$\frac{10x - 2}{x^{2} - 1} = \frac{-12}{x^{2} - 1}$

$(10x - 2)(x^{2} - 1) = -12(x^{2} - 1)$
$10x^{3} - 10x^{2} - 2x^{2} + 2 = -12(x^{2}) + 12(1)$
$10x^{3} - 12x^{2} + 2 = -12x^{2} + 12$
$10x^{3} - 12x^{2} + 12x^{2} + 2 = -12x^{2} + 12x^{2} + 12$
$10x^{3} + 2 - 2 = 12 - 2$
$\frac{10x^{3}}{10} = \frac{10}{10}$

$x^{3} = 1$
$x = 1$

4 0

3 years ago

Jennifer is hanging a curtain in her bedroom. She wants the width of the curtain to be the same as the width of the window. If t

shtirl [24]

Answer:

Step-by-step explanation:

200 cm or 2 meters wide (since 1 meter = 100 cm)

6 0

3 years ago

If x° – 7x2 + kx + 15 is exactly divisible by (x – 3), then find the value of k.​

If x° – 7x2 + kx + 15 is exactly divisible by (x – 3), then find the value of k.