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Snowcat [4.5K]
4 years ago
11

Someone please please please help me out

Mathematics
1 answer:
Bingel [31]4 years ago
6 0

Answer:

3x + 4y = 8

Step-by-step explanation:

When the slope of the line and a point passing through a point is given we can use slope & one point form to arrive at the equation.

  Slope and on - point form:  (y - y_1) = m(x - x_1)

where m is the slope of the line and

(x_1, y_1) is the point on the line.

Here, $ m = \frac{-3}{4} $ and $ (x_1, y_1) = (4, -1) $.

Therefore: $ y + 1 = \frac{-3}{4} (x - 4) $

$ \implies 4y + 4 = -3x + 12 $

i.e., 3x + 4y = 8

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hram777 [196]

Answer:

D

Step-by-step explanation:

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3 years ago
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Vilka [71]
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A rectangular solid has sides of 7 cm + 9 cm + 11 cm what<br> is its surface area
alina1380 [7]

Your answer would be: <em>693.</em>

Explanation:

When finding the area in a problem use <em>L×W×H</em>.

That being said, you now have to multiply the <em>L×W×H</em> (7x9x11)

7 × 9 × 11 = <em>693</em>

So the answer would be <em>693</em> because, if you are finding an area you use <em>L×W×H</em> to find your area.


6 0
3 years ago
Read 2 more answers
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the
devlian [24]

Answer:

The rocket will reach its maximum height after 6.13 seconds

Step-by-step explanation:

To find the time of the maximum height of the rocket differentiate the equation of the height with respect to the time and then equate the differentiation by 0 to find the time of the maximum height

∵ y is the height of the rocket after launch, x seconds

∵ y = -16x² + 196x + 126

- Differentiate y with respect to x

∴ y' = -16(2)x + 196

∴ y' = -32x + 196

- Equate y' by 0

∴ 0 = -32x + 196

- Add 32x to both sides

∴ 32x = 196

- Divide both sides by 32

∴ x = 6.125 seconds

- Round it to the nearest hundredth

∴ x = 6.13 seconds

∴ The rocket will reach its maximum height after 6.13 seconds

There is another solution you can find the vertex point (h , k) of the graph of the quadratic equation y = ax² + bx + c, where h = -\frac{b}{2a} and k is the value of y at x = h and k is the maximum/minimum value

∵ a = -16 , b = 196

∴ h=-\frac{196}{2(-16)}

∴ h = 6.125

∵ h is the value of x at the maximum height

∴ x = 6.125 seconds

- Round it to the nearest hundredth

∴ x = 6.13 seconds

4 0
3 years ago
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