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2 years ago

7. What is the equation of the line that passes through (-1, -4) and (0,5)?

Mathematics

1 answer:

Serga [27]2 years ago

3 0

Answer:

A)y=9x+5

Step-by-step explanation:

If x=-1, y=-4,

y=9*-1+5=(-9)+5=-4

If x=0, y=5,

y=9*0+5=5

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Calculating cos-1 ( help is gladly appreciated :) )

Alekssandra [29.7K]

Answer:

$\frac{3\pi}{4}$

(Assuming you want your answer in radians)

If you want the answer in degrees just multiply your answer in radians by $\frac{180^\circ}{\pi}$ giving you:

$\frac{3\pi}{4} \cdot \frac{180^\circ}{\pi}=\frac{3(180)}{4}=135^{\circ}$ .

We can do this since $\pi \text{ rad }=180^\circ$ (half the circumference of the unit circle is equivalent to 180 degree rotation).

Step-by-step explanation:

$\cos^{-1}(x)$ is going to output an angle measurement in $[0,\pi]$ .

So we are looking to solve the following equation in that interval:

$\cos(x)=-\frac{\sqrt{2}}{2}$ .

This happens in the second quadrant on the given interval.

The solution to the equation is $\frac{3\pi}{4}$ .

So we are saying that $\cos(\frac{3\pi}{4})=\frac{-\sqrt{2}}{2}$ implies $\cos^{-1}(\frac{-\sqrt{2}}{2})=\frac{3\pi}{4}$ since $\frac{3\pi}{4} \in [0,\pi]$ .

Answer is $\frac{3\pi}{4}$ .

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3 years ago

Consider the triangle.

BigorU [14]

Answer:

It's the second answer down : Angle B, A and C

Step-by-step explanation:

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3 years ago

Frank's painting is on a large triangular canvas with side lengths 4 meters,

Mazyrski [523]

Answer:

3213 cm

Step-by-step explanation:

First draw the frame around the triangle. The circular edges added together give you 360 degrees. Use pi*r^2 to get 4pi which is around 12.56. 100cm=m. 2*500+2*400*2*700=3200.

3200+ 13 = 3213

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3 years ago

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CAN I PLSS GET HELP ASAP!!? What slope- intercept form equation represents the line

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Answer:

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Step-by-step explanation:

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3 years ago

is the diameter of a circle with center P. The coordinates of the endpoints of the diameter are (1, 3) and (6, 6). What are the

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This the concept of geometry, we are required to get the coordinates of the point p which is the center of the circle.
The center of the circle will be at the point:
(x,y)
=[(6-1)/2,(6-3)/2]
=(5/2,3/2)

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3 years ago