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AVprozaik [17]
3 years ago
11

PLEASE HELP, ILL GIVE YOU 15

Mathematics
1 answer:
Anestetic [448]3 years ago
8 0

Answer:

2700

Step-by-step explanation:

9x20x15= 2700

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Factor completely<br> x^2 - 3x - 28
lbvjy [14]

Answer:

(x-7)  (x+4)

Step-by-step explanation:

x^2 - 3x - 28

What two numbers multiply to -28 and add to -3

-7*4 = -28

-7+4 = -3

(x-7)  (x+4)

5 0
3 years ago
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The expression 6x to the second power gives the surface area of a cube, and the expression x to the third power gives the volume
Furkat [3]

Answer:

Volume = 6 * 6 * 6 = 216 m³

SA = 36 * 6 = 216 m²

Step-by-step explanation:

8 0
3 years ago
What fraction is the greatest in this row? 12/4, 4/4, 2 2 / 4, 1/4. also 2 2 /4 is a mixed number
kakasveta [241]

Answer:

12/4

Step-by-step explanation:

4/4 is 1

1/4 is well 1/4

2 2/4 is 2 1/2

12/4 is 3

the greatest fraction is 3

4 0
3 years ago
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The main cable of a suspension bridge forms a parabola, described by the equation y = a(x - h)2 + k, where y is the height in fe
nirvana33 [79]
Refer to the diagram shown below.

When x = 30 ft, the cable is at 15 ft, therefore y(30) = 15.
That is,
a(30 - h)² + k = 15            (1)

Also, because the distance between the supports is 90 ft, therefore
y(0) = 6 ft, and y(90) = 6 ft
That is,
a(-h)² + k = 6                 (2)
a(90 - h)² + k = 6          (3)

From (2) and (3), obtain
a(90 - h)² = ah²
90² - 180h + h² = h²
180h = 90²
h = 45 ft.

From (1) and (2), obtain
225a + k = 15
2025a + k = 6

Therefore
1800a = -9
a = - 0.005
k = 15 - 225(-0.005) = 16.125 ft

Answer:
The equation for the cable is
y = - 0.005(x - 45)² + 16.125 

A graph of the solution verifies that the solution is correct.

6 0
3 years ago
Read 2 more answers
What is the best way to Solve: 25 – 5x = 80
Art [367]
25 - 5x = 80
 + 5x         + 5x

25 = 5x + 80
- 80         -80

-55 = 5x

-55/5 = 11

x = 11 


Hope I helped!

Let me know if you need anything else!

~ Zoe          
5 0
3 years ago
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