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Artemon [7]
3 years ago
5

Which of these expressions is equivalent to m^2 - n^2 - 14n - 49?

Mathematics
1 answer:
polet [3.4K]3 years ago
6 0

Answer:

n = m - 7 or n = -m - 7

Step-by-step explanation:

Solve for n:

m^2 - (n + 7)^2 = 0

The left hand side factors into a product with two terms:

(-7 + m - n) (7 + m + n) = 0

Split into two equations:

-7 + m - n = 0 or 7 + m + n = 0

Subtract m - 7 from both sides:

-n = 7 - m or 7 + m + n = 0

Multiply both sides by -1:

n = m - 7 or 7 + m + n = 0

Subtract m + 7 from both sides:

Answer:    n = m - 7 or n = -m - 7

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Is the function continuous at x = -17
Pavlova-9 [17]

For a function to be continuous at an x-value, say -17, you need to make sure two things line up:

The limit from the left equals the limit from the right.

     \lim_{x \to -17^{-}} f(x) =  \lim_{x \to -17^{+}} f(x)

This limit equals the functions value.

    \lim_{x \to -17} f(x) = f(-17)

The left hand limit involves the first piece, f(x) = 20x + 1:

    \begin{aligned} \lim_{x \to -17^{-}} f(x) &=  \lim_{x \to -17^{-}} (20x+1)\\[0.5em]&=   20(-17)+1\\[0.5em]&=   -339\endaligned}

The right hand limit invovles the second piece, f(x) = -10x^2:

    \begin{aligned} \lim_{x \to -17^{+}} f(x) &=  \lim_{x \to -17^{+}} (-10x^2)\\[0.5em]&=   -10\cdot (-17)^2\\[0.5em]&=   -2890\endaligned}

Since the two one-sided limits don't match, the function is not continuous at x=-17.

3 0
3 years ago
PLEASE HELP Consider these dimensions for a cylindrical aquarium.
Tanzania [10]

Answer:

v=pi252(14)

Step-by-step explanation:

4 0
3 years ago
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Solve formula for B v= 1/3Bh
MaRussiya [10]

v = 1/3Bh

Divide both sides by h.

v/h = 1/3B

Multiply both sides by 3.

3v/h = B

\boxed {B = \frac{3v}{h} }

5 0
3 years ago
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Hw 24 area of parallelogram
Papessa [141]

Answer:

<h2>The width, x, of this parallelogram is 16 cm.</h2>

Step-by-step explanation:

In #14, the area of the parallelogram is 528 cm².

This area is also the value of the formula A = L·W:

A = 528 cm² = (33 cm)·W

To determine the width, W, of this parallelogram, we perform the following division:

W = (528 cm²) / (33 cm) = 16 cm

The width, x, of this parallelogram is 16 cm.

7 0
3 years ago
Given that y = 6 + 4x-x^2express y in the form a.-(x + b)^2, where a and b are
Y_Kistochka [10]

Answer:

6 + 4x − x² = 10 − (x − 2)²

the turning point : (2 , 10)

Step-by-step explanation:

6 + 4x − x² =  − x² + 4x + 6

                 = − (x² − 4x) + 6

                 = − (x² − 4x + 4 − 4) + 6

                 = − [(x − 2)² − 4] + 6

                 = − (x − 2)² + 4 + 6

                 = − (x − 2)² + 10

                 = 10 − (x − 2)²

Then the turning point of y is (2 , 10)

4 0
2 years ago
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