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Likurg_2 [28]
2 years ago
13

Help me please please

Mathematics
1 answer:
telo118 [61]2 years ago
6 0

Answer:

see below

Step-by-step explanation:

Standard equation for a circle with center h,k and radius r

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

so for this one   center =  (1,2)   radius = 4

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A line passes through the points (1, 4) and (3, –4). Which is the equation of the line?
horsena [70]

Answer:

The equation of line passing through points (1 , 4) and (3 , - 4) is                y = - 4 x + 8

Step-by-step explanation:

Given as :

A line is passing through points

x_1 , y_1 = 1 , 4

x_2 , y_2 = 3 , - 4

<u>Now, Equation of line in point-slope form is</u>

y -  y_1 = m × (x -  x_1)

where m is the slope of line

∵ m = \dfrac{y_2 - y_1}{x_2 - x_1}

i.e m = \dfrac{ ( - 4 ) - 4}{3 - 1}

Or, m = \dfrac{ - 8}{2}

Or, m = - 4

So, The slope of line = m = - 4

∵, equation of line can be written as

y -  y_1 = m × (x -  x_1)

<u>So, Putting the value of slope, m and points ( x_1 , y_1  )</u>

i.e  y - 4 = ( - 4 ) × ( x - 1 )

Or, y - 4 = ( - 4 ) × x + 4

Or, y - 4 = - 4 x + 4

Or, y = - 4 x + 4 + 4

∴    y = - 4 x + 8

So, The equation of line y = - 4 x + 8

Hence, The equation of line passing through points (1 , 4) and (3 , - 4) is       y = - 4 x + 8  Answer

8 0
3 years ago
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Write 321.51 as word form​
BlackZzzverrR [31]

Answer:

three hundred twenty one and fifty one hundredths

3 0
3 years ago
Round this number to the nearest 100,000 3,153,007 Answer
lukranit [14]
3,153,007 rounded to the nearest 100,000 is 3,200,000.
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4 years ago
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Find the value of the following expression:
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Answer:

4

Step-by-step explanation:

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Find the distance from point A(15, -21) to the line 5x +2y = 4
jarptica [38.1K]
The distance from a point to a line is
distance(ax+by+c=0,(x0,y0)) = abs(ax0+by0+c)/sqrt(a^2+b^2)
So first convert the formula for the line to standard form
5x+2y=4
5x+2y-4=0

a=5, b=2, c=-4, x0=15, y0=-21

abs(5*15+2*(-21)-4)/sqrt(5*5+2*2)
= abs(75-42-4)/sqrt(25+4)
= 29/sqrt(29)
= sqrt(29)
= 5.385165 (approximately)

3 0
3 years ago
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