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alina1380 [7]
2 years ago
10

Question 9 Write the equation of the line passing through (3,-17) parallel to 8x - 7y=87

Mathematics
1 answer:
just olya [345]2 years ago
7 0

Rewriting the equation of the given line in slope-intercept form,

8x-7y=87\\\\-7y=-8x+87\\\\7y=8x-87\\\\y=\frac{8}{7}x-\frac{87}{7}

The slope of the given line is thus 8/7, and since parallel lines have the same slope, the slope of the line we want to find is also 8/7.

Substituting into point-slope form,

y+17=\frac{8}{7}(x-3)\\\\y+17=\frac{8}{7}x-\frac{24}[7}\\\\\boxed{y=\frac{8}{7}x-\frac{143}{7}}

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Recall the question for a circle with center. (H,k) and Radius r. At what point in the first quadrant does the line with equatio
kap26 [50]

Answer:

the point lies at (1.7, 3.6) in the first quadrant.

Step-by-step explanation:

The formula for a circle with centre (h,k) and radius (r) can be expressed as :

(x-h)² + (y-k)² = r²

Now for the expression of the circle with radius 3 and center (0,1), we have:

(x - 0)² + (y - 1)² = 3²

x² + (y-1)² = 9

replacing y = 1.5x + 1 in the above equation, we have:

x² + (( 1.5x + 1 ) - 1 )² = 9

x² + ( 1.5x +1 - 1)² = 9

x² + (1.5x)² = 9

x² + 2.25x² = 9

3.25x² = 9

x² = 9/3.25

x^2 = \dfrac{9}{\dfrac{13}{4}}

x^2 = {9} \times {\dfrac{4}{13}}

x= \sqrt{{9} \times {\dfrac{4}{13}}}

x= \pm 3 \times \dfrac{2}{\sqrt{13}}}

x= \pm \dfrac{6}{\sqrt{13}}}

x = 1.7 in the positive x - axis

Recall that:

y = 1.5x + 1

y = 1.5 (1.7) +1

y = 2.55 +1

y = 3.55

y = 3.6

Therefore, the point lies at (1.7, 3.6) in the first quadrant.

4 0
3 years ago
Convert 7x + 3y = −1 to slope-intercept form.
maksim [4K]
Hi there!

Let's solve this problem step by step!

7x + 3y =  - 1
To convert this formula to slope-intercept form, we must isolate y.

First bring 7x to the left by subtracting 7x from both sides of the equation.
3y =  - 7x - 1

Finally we need to divide both sides of the equation by 3.
\frac{3y}{3}  =  \frac{ - 7x - 1}{3}

Do some simple algebra and we find:
y =  -  \frac{7}{3} x -  \frac{1}{3}   \\ y =  - 2 \frac{1}{3} x -  \frac{1}{3}
~ Hope this helps you!
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4 years ago
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tankabanditka [31]

Answer: 109

Step-by-step explanation: Substitute in 4 for m and 5 for n in the equation:

(4)^3 + 9(5)

(4*4*4) +45

(16*4) +45

64+45 =109

Hope this helped!

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Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

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Step-by-step explanation:

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