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Ahat [919]
3 years ago
10

Determine the equation, in slope-intercept form, for the line that is

Mathematics
1 answer:
Black_prince [1.1K]3 years ago
4 0
Perpendicular lines have negative reciprocal slopes.

Let the slope of the linear equation, y = 1/2x — 4 be m1 = 1/2

And the slope of the line perpendicular to y = 1/2x — 4 as m2,

Then it means that the slope of m2 must be -2 (because if you multiply 1/2 with -2, the result will be - 1).

Now that we have our slope for m2, we can find out the equation of the line by using point (4,1) and slope (m) = -2. Plug these values into the slope-intercept form:

y = mx + b
1 = -2(4) + b
1 = -8 + b
Add 8 to both sides to solve for y-intercept, b:
1 + 8 = -8 + 8 + b
9 = b

Since the y-intercept, b = 9, and slope m2 = -2, we can establish the linear equation of the perpendicular line:

y = -2x + 9

Please mark my answers as the Brainliest if you find this explanation helpful :)
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Factorise<br>. (x+2) ²-6 (x+ 2) +9​
soldier1979 [14.2K]

Answer:

(x-1)(x-1)

Step-by-step explanation:

hello :

(x+2) ²-6 (x+ 2) +9​ =(x+2) ²-2×(<em>3</em>) (x+ 2) +<em>3²</em>

by identity :   (a-b)² = a²-2ab+b²

let : a=x+2   and   b= <em>3</em>

(x+2) ²-6 (x+ 2) +9​ =(x+2) ²-2×(<em>3</em>) (x+ 2) +<em>3²=</em> ((<em>x+2)-3</em>)<em>²= (</em>x+2-3)² = (x-1)²=

(x-1)(x-1)

4 0
4 years ago
When does the proportion form of newton's second law take the form of an equation?
Brrunno [24]
Newton's law of motion has three parts. The second of which states that the force needed to move an object is directly proportional to the acceleration of the motion. The proportion can be written as,
              F = ka
where k is the constant of proportionality. This can be substituted with the mass of the object such that the equation would become. 
                F = ma
where F is force, m is mass, and a is acceleration. 
8 0
3 years ago
Please help me figure this out! Thank you so much :( i really need it! ❤️
Hoochie [10]

Answer:

  \textbf{A. }x=2i\text{ or }x=-2i\\\\\textbf{B. }(x+2i)(x-2i)

Step-by-step explanation:

The quadratic can be solved in a straightforward way:

  x^2+4=0\\\\x^2=-4\qquad\text{subtract 4}\\\\x=\pm\sqrt{-4}\qquad\text{take the square root}\\\\x=\pm2i\qquad\text{simplify}

This tells you that the solutions are ...

  2i or -2i

__

For each root of "a", (x -a) is a factor. Thus the factors of the equation are ...

  (x +2i)(x -2i)

8 0
3 years ago
If you apply the changes below to the quadratic parent function, f(x) = x2, what is the equation of the new function? Shift 3 un
Alex17521 [72]
To apply the changes to the equation of a vertical stretch of 4 and a translation of 3 units to the right, as well as the correct answer would be choice B.

The reason for this is when you apply a vertical stretch, because it changes the y-values (which causes it to vertically stretch or appear skinnier when graphed), you would multiply 4 to f(x) which would look like 4x^2.

Then, since you have a reflection over the x-axis, you must multiply a -1 to f(x) to reflect it over the x-axis which would result in -4x^2.

Finally, it also asks to shift the graph right 3 which by moving it right, you change the x values meaning you will perform f(x-3) to achieve this (subtract the value from x when you move right, and add the value to x when you move left).

This therefore results in your answer, the new graph would be
g(x)= -4(x-3)^2 or choice B.
8 0
4 years ago
pls help - will give brainliest farmer is painting a new barn. He will need to calculate the surface area of the barn to purchas
Brut [27]

Answer:

m^2

Step-by-step explanation:

You only need the surface area, which means you will not use cubed (^3). But the surface area is two dimensions (length and width). SO you must use m^2.

6 0
3 years ago
Read 2 more answers
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