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3 years ago

Need help doing this question, i think i got all of them wrong. If you explain your thought process it'd be nice too!

Mathematics

1 answer:

icang [17]3 years ago

8 0

Answer:

4 with 3

Step-by-step explanation:

the only ones that are perpendicular to each other are

y = 7/4 x - 2 with y = - 4/7 + 2

since the condition is met so that two lines are perpendicular

slope1 * slope2 = -1

7/4 * -4/7 = -1 correct

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Complete questions 6,7,8.

dusya [7]

Step-by-step explanation:

Prime factors of :

• 80 = 2 × 2 × 2 × 2 × 5

• x² = x × x

• y = y

• 80x²y = 2 × 2 × 2 × 2 × 5 × x × x × y

Prime factors of :

• 56 = 2 × 2 × 2 × 7

• x³ = x × x × x

• y² = y × y × y

• 56x³y² = 2 × 2 × 2 × 7 × x × x × x × y × y

Prime factors of :

• 81 = 3 × 3 × 3 × 3

• x = x

• y² = y × y

• 81xy² = 3 × 3 × 3 × 3 × x × y × y

#CMIIW ^^

3 0

4 years ago

Please solve this for me!

Slav-nsk [51]

Answer:

y = -1/6x +2

Step-by-step explanation:

The black vertical line in the middle of the graph is the y-axis. The blue line crosses it a the point marked 2. This is known as the y-intercept.

The slope of the line is the ratio of "rise" (vertical change) to "run" (horizontal change).

There is a marked point on the line at the y-intercept, where x=0 and y=2. There is another marked point to the right of that, where x=6 and y=1.

The vertical change between those two points is 1 -2 = -1.

The horizontal change between those two points is 6 -0 = 6

The slope is then -1/6.

The slope-intercept form of the equation of a line is often written as ...

y = mx + b

where "m" is the slope (-1/6), and "b" is the y-intercept.

Using the values we found above, the equation of the line is ...

y = -1/6x +2

5 0

3 years ago

Daniel is climbing up a cliff at a rate of 2 meters per minute. What is his rate in feet per hour?

il63 [147K]

The answer is 394 feet per hour and also good luck to what ever you working on

6 0

3 years ago

If (x + 2) is a factor of x3 – 19x – p, find the value of p. Help please

Sergio039 [100]

If $x-a$ is a factor of a polynomial $P(x)$ then, $a$ is its root.

So $-2$ is a root of $x^3-19x-p$

$(-2)^3-19\cdot(-2)-p=0\\-8+38-p=0\\p=30$

3 0

4 years ago

18 - 24i write in trigonometric form

stiks02 [169]

$\boxed{18-24i=30(cos(5.36)+isin(5.36))}$

<h2>Explanation:</h2>

Unlike 0, we can write any complex number in the trigonometric form:

$z=r(cos\alpha+isin\alpha)$

We have the complex number:

$18-24i$

So $r$ can be found as:

$r=\sqrt{x^2+y^2} \\ \\ \\ Where: \\ \\ x=18 \\ \\ y=-24 \\ \\ r=\sqrt{18^2+(-24)^2} \\ \\ r=\sqrt{324+576} \\ \\ r=\sqrt{900} \\ \\ r=30$

Now for α:

$\alpha=arctan(\frac{y}{x}) \\ \\ Since \ the \ complex \ number \ lies \ on \ the \ fourth \ quadrant: \\ \\ \alpha=arctan(\frac{-24}{18})=-53.13^{\circ} \ or \ 360-53.13=306.87^{\circ}$

Finally:

$Convert \ into \ radian: \\ \\ 360^{\circ}\times \frac{\pi}{180}=5.36rad \\ \\ \\ Hence: \\ \\ \boxed{18-24i=30(cos(5.36)+isin(5.36))}$

<h2>Learn more:</h2>

Complex conjugate: brainly.com/question/2137496

#LearnWithBrainly

6 0

4 years ago