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3 years ago

I need Answer Immediately!!!!!!!!!

Mathematics

2 answers:

ella [17]3 years ago

7 0

Answer:

the equation is x-6

pls mark me as brainliest

shtirl [24]3 years ago

6 0

Answer:

this might help you :

There are several forms that the equation of a line can take. They may look different, but they all describe the same line--a line can be described by many equations. All (linear) equations describing a particular line, however, are equivalent.

The first of the forms for a linear equation is slope-intercept form. Equations in slope-intercept form look like this:

y = mx + b

where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis.

To write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. This is the value of m in the equation. Next, find the coordinates of the y-intercept--this should be of the form (0, b). The y- coordinate is the value of b in the equation.

Finally, write the equation, substituting numerical values in for m and b. Check your equation by picking a point on the line (not the y-intercept) and plugging it in to see if it satisfies the equation.

Example 1: Write an equation of the following line in slope-intercept form:

Graph of a Line

First, pick two points on the line--for example, (2, 1) and (4, 0). Use these points to calculate the slope: m = = = - .

Next, find the y-intercept: (0, 2). Thus, b = 2.

Therefore, the equation for this line is y = - x + 2.

Check using the point (4, 0): 0 = - (4) + 2 ? Yes.

Example 2: Write an equation of the line with slope m = which crosses the y-axis at (0, - ).

y = x -

Example 3: Write an equation of the line with y-intercept 3 that is parallel to the line y = 7x - 9.

Since y = 7x - 9 is in slope-intercept form, its slope is 7.

Since parallel lines have the same slope, the slope of the new line will also be 7. m = 7. b = 3.

Thus, the equation of the line is y = 7x + 3.

Example 4: Write an equation of the line with y-intercept 4 that is perpendicular to the line 3y - x = 9.

The slope of 3y - x = 9 is .

Since the slopes of perpendicular lines are opposite reciprocals, m = - 3. b = 4.

Thus, the equation of the line is y = - 3x + 4.

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Lyrx [107]

How did you do that

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3 years ago

7. A quadratic function has the form y-ax' for

gladu [14]

The answer is 27.29 trust

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2 years ago

I need help please <br>find b

dybincka [34]

Answer:

Step-by-step explanation:

This triangle is a 3-4-5 Pythagorean Triple. 9 is 3*3, 15 is 5*3, so b is 4*3, which is 12. Alternatively, you could use the Pythagorean Theorem's converse, sqrt(15^2-9^2), and get 12.

5 0

3 years ago

The cosine of 23° is equivalent to the sine of what angle

Archy [21]

Answer:

So 67 degrees is one value that we can take the sine of such that is equal to cos(23 degrees).

(There are more values since we can go around the circle from 67 degrees numerous times.)

Step-by-step explanation:

You can use a co-function identity.

The co-function of sine is cosine just like the co-function of cosine is sine.

Notice that cosine is co-(sine).

Anyways co-functions have this identity:

$\cos(90^\circ-x)=\sin(x)$

$\sin(90^\circ-x)=\cos(x)$

You can prove those drawing a right triangle.

I drew a triangle in my picture just so I can have something to reference proving both of the identities I just wrote:

The sum of the angles is 180.

So 90+x+(missing angle)=180.

Let's solve for the missing angle.

Subtract 90 on both sides:

x+(missing angle)=90

Subtract x on both sides:

(missing angle)=90-x.

So the missing angle has measurement (90-x).

So cos(90-x)=a/c

and sin(x)=a/c.

Since cos(90-x) and sin(x) have the same value of a/c, then one can conclude that cos(90-x)=sin(x).

We can do this also for cos(x) and sin(90-x).

cos(x)=b/c

sin(90-x)=b/c

This means sin(90-x)=cos(x).

So back to the problem:

cos(23)=sin(90-23)

cos(23)=sin(67)

So 67 degrees is one value that we can take the sine of such that is equal to cos(23 degrees).

6 0

2 years ago

I literally have no clue what this unit is about so help

vaieri [72.5K]

The answer is D
if the legs are 5 and 4 cm the equation to find the hypotenuse would be 5^2+4^2=c^c
5 squared is 25 and 4 squared is 16 that gives you 41, normally you would square root the 41 but it gives you a decimal number

5 0

2 years ago

Read 2 more answers