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2 years ago

Which of the following are best described as lines that meet to form a right angle?

Mathematics

2 answers:

rewona [7]2 years ago

7 0

Answer:

perpendicular lines

Step-by-step explanation:

Definition of perpendicular lines:

Two lines that intersect forming a right angle are perpendicular lines.

Answer: perpendicular lines

Lynna [10]2 years ago

6 0

Answer:

Two lines that intersect and form right angles are called perpendicular lines.

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pantera1 [17]

Answer:

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Step-by-step explanation:

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3 years ago

What values are not in the domain of (-5+2x^2)/7-8x ?

NemiM [27]

$\frac{-5 + 2x^{2}}{7 - 8x}$

The denominator cannot equal zero.

7 - 8x ≠ 0

7 ≠ 8x

$\frac{7}{8} \neq \frac{8x}{8}$

$\frac{7}{8} \neq x$

Answer: $\frac{7}{8}$ is not in the domain

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3 years ago

2/5of a number is 80. What is 3/4of the same number?

lara [203]

Answer:

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2 years ago

Write the point-slope form of an equation of the line through the points (-7, 7) and (4, 1).

seraphim [82]

Answer:

Choice B. $\displaystyle y - 7 = -\frac{6}{11} \, (x + 7)$ .

Step-by-step explanation:

Start by finding the slope of this line. Let $(x_1,\, y_1)$ and $(x_2,\, y_2)$ represent two distinct points on a line on a Cartesian Plane. (That is, $x_1 \ne x_2$ .) The slope of this line would be:

$\displaystyle \frac{y_2 - y_1}{x_2 - x_1}$ .

For the line in this question:

$x_1 = -7$ ,
$y_1 = 7$ ;

$x_2 = 4,$
$y_2 = 1$ .

Indeed, $x_1 \ne x_2$ . The slope of this line would thus be $\displaystyle \frac{1 - 7}{4 - (-7)}$ , which is equal to $\displaystyle -\frac{6}{11}$ .

On a Cartesian Plane, the point-slope form of a line that has a slope of $m$ and includes the point $(x_0,\, y_0)$ can be written as:

$y - y_0 = m\, (x - x_0)$ .

(Note the minus signs in this form.)

For the line in this question, $m = \displaystyle -\frac{6}{11}$ . There are two equivalent expressions for its point-slope form:

Using the first point, $y - 7 = \displaystyle -\frac{6}{11}\, (x - (-7))$ . This equation is equivalent to $y - 7 = \displaystyle -\frac{6}{11}\, (x + 7)$ .
Using the second point, $y - 1 = \displaystyle -\frac{6}{11}\, (x - 4)$ .