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LiRa [457]
2 years ago
14

Find the x-coordinates of the points where the graph crosses the x-axis:

Mathematics
1 answer:
ruslelena [56]2 years ago
3 0

Answer:

29.  (5,0) and (-7/2,0)

30.  (-1,0) and (5/7,0)

Step-by-step explanation:

29. y=2x² - 3x - 35

      y = (x-5)(2x+7)

y is 0 at x = 5 and -(7/2)

31: y=-7x² - 2x + 5

    y =  -(x+1)(7x-5)

y is 0 at -1 and 5/7

See the attached graph.

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The atmospheric pressure P on a balloon or in aircraft decreases with increasing height . This pressure measured in Millimeters
Vesnalui [34]

Answer:

(A)   5.47 km

(B)   1.38 km

Step-by-step explanation:

The relationship between Pressure (mmHg) and Height (km) is given by the equation below:

p =760 e⁻ 0.145h----------------------------------------------------- (1)

(a) The height of the aircraft can be calculated by making 'h' the subject of equation (1)

In (p/760) = -0.145 h

h = -In (p/760) /0.145

h= In (760/p)/ 0.145------------------------------------------------- (2)

For the aircraft, p =344 mmHg; substituting into (2)

h = In (760/344)/0.145

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h = In (760/622)/0.145

  = 0.2003 / 0.145

  =  1.3813 km

  ≈  1.38 km

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Arte-miy333 [17]

Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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