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Arisa [49]
3 years ago
11

4. What is the equation of a line with a slope of 5 that passes through the point (4,2) ? Express this equation in all three for

ms: point-slope, slope-intercept, and standard.
Mathematics
2 answers:
Colt1911 [192]3 years ago
5 0
Incase you did not know, f(x) is a way of writing equations, for lines, if you do not know what the equation is.

2 = f(4)
f(x) = 5x-c
f(4) = 20-c
c = 20-2 = 18
f(x) = 5x-18

thus...
y = 5x-18

also...
the y intercept is -18
stiv31 [10]3 years ago
3 0
Slope = 5
y = mx + b
2 =5(4) + b
b = 2 - 20
b = -18


<span>point-slope equation
y - 2 = 5(x -4)

</span><span>slope-intercept equation
y = 5x - 18

standard form
5x - y = 18</span>
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Just factor to find the roots 

<span>6x² - 6x - 72 = 0 </span>
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Algebraic equation of 185 is less than a number
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Michael writes down 4 different factors of 60
Marizza181 [45]

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3 0
3 years ago
Circle P is described by the equation (x−1)2+(y+6)2=9 and circle Q is described by the equation (x+4)2+(y+14)2=4. Select from th
xeze [42]

Answer:

(a) Circle Q is 9.4 units to the center of circle P

(b) Circle Q has a smaller radius

Step-by-step explanation:

Given

P:(x - 1)^2 + (y + 6)^2 = 9

Q:(x + 4)^2 + (y + 14)^2 = 4

Solving (a): The distance between both

The equation of a circle is:

(x - h)^2 + (y - k)^2 = r^2

Where

Center: (h,k)

Radius:r

P and Q can be rewritten as:

P:(x - 1)^2 + (y + 6)^2 = 3^2

Q:(x + 4)^2 + (y + 14)^2 = 2^2

So, for P:

Center = (1,-6)

r = 3

For Q:

Center = (-4,-14)

r = 2

The distance between them is:

d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2

Where:

Center = (1,-6) --- (x_1,y_1)

Center = (-4,-14) --- (x_2,y_2)

So:

d = \sqrt{(1 - -4)^2 + (-6 - -14)^2

d = \sqrt{(5)^2 + (8)^2

d = \sqrt{25 + 64

d = \sqrt{89

d = 9.4

Solving (b): The radius;

In (a), we have:

r = 3 --- circle P

r = 2 --- circle Q

By comparison

2 < 3

<em>Hence, circle Q has a smaller radius</em>

4 0
3 years ago
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