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MAVERICK [17]
3 years ago
5

NEED HELP ASAP!!!!!!!!!!! 2. Solve for x 3. Solve for x

Mathematics
1 answer:
Anton [14]3 years ago
4 0

Answer:

2. x = 47

3. x = 2

Step-by-step explanation:

These problems involve proportions, or equivalent ratios.  You can solve for 'x' in each by using cross-multiplication and division.

2.  28(7) = 4(x + 2)

Distribute = 196 = 4x + 8

Subtract 8 from both sides: 196 - 8 = 4x + 8 - 8 or 188 = 4x

Solve for x:  x = 47

3.  2(2x + 7) = 11(3x - 4)

Distribute: 4x + 14 = 33x - 44

Add 44 to both sides: 4x + 14 + 44 = 33x - 44 + 44 or 4x + 58 = 33x

Subtract 4x from both sides: 4x + 58 - 4x = 33x - 4x or 58 = 29x

Solve for x: x = 2

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Monica [59]

Answer:

breadth: 3 m and area of rectangle: 27 m²

explanation:

part A:

perimeter of rectangle: 2 ( length + breadth )

using the formula:

24 = 2 ( 9 + breadth )

9 + breadth = 12

breadth  = 3 m

part B:

area of the rectangle​ =  length * breadth

using the formula:

9 * 3

27 m²

3 0
2 years ago
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Olenka [21]

Answer:

8

Step-by-step explanation:

-12u and 12u cancel each other out. Leaving 8 by itself.

8 0
3 years ago
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Dovator [93]

Answer:

x || t,         [Given]  

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When two parallel lines are cut by a transversal, then the pairs of corresponding angles are equal in measure.

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Substitute value [1] in [2] we have;

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3 0
2 years ago
(5 + 61) - (12 + 71)
k0ka [10]

Answer:

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3 0
3 years ago
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PLEASE HELP!!!!! The velocity of sound in air is given by the equation , where v is the velocity in meters per second and t is t
jeyben [28]

The equation of velocity of sound in air is v = 20 √(273 + t). In this problem, we need to find the temperature when the velocity is 329 meters/s. You need to measure the time it takes a sound to travel a measured distance in order to measure its speed in air.

 

Given:

Velocity of sound in air equation = v = 20 √(273 + t)

Velocity = 329 m/s

 

To solve:

V = 20 √(273 + t)

<span>
329 = 20 * sqrt(273 + t)</span>

<span>
16.45 = sqrt(273 + t)</span>

<span>
273 + t = 16.45^2</span>

<span>
t- 16.45^2-273</span>

<span>
t = -2.4 degrees Celsius</span>

 

<span>So, the temperature when the velocity is 329 meters per second is -2.4 degrees Celsius.</span>

3 0
3 years ago
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