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Vinvika [58]
3 years ago
8

d) What are the values for coefficients a, b, and c in the quadratic equation for Daredevil Danny’s practice jump? (5 points)

Mathematics
2 answers:
SIZIF [17.4K]3 years ago
3 0

Answer:

a = -0.32

b = 16

c = - 168

Step-by-step explanation:

In the figure attached, the quadratic function is shown. We can model it as follows:

y = a*(x - x1)*(x - x2)

where (x1, 0) and (x2, 0) are its roots

From the picture, roots are (15, 0) and (35, 0), replacing them into the equation:

y = a*(x - 15)*(x - 35)

and the vertex is at (25,32), replacing into the equation:

32 = a*(25 - 15)*(25 - 35)

32 = a*(-100)

a = 32/(-100)

a = -0.32

Applying distributive property:

y = -0.32*(x - 15)*(x - 35)

y = -0.32*(x² - 35x - 15x + 525)

y = -0.32x² + 16x - 168

which corresponds to the general form:

y = ax² + bx + c

mariarad [96]3 years ago
3 0

Answer:

a is -0.32

b is 26

c is -168

Step-by-step explanation:

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Pete has already completed 27 missions. Pete plans to complete 3 missions per week

Let x represents weeks

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OLEGan [10]

The correct answer is 12:16 P.M.

<h3>How to find when did Deb finish eating lunch ?</h3>

According to the problem,

  • Deb started doing yard work at 9:52 A.M.
  • After working for 1 hour and 48 minutes, she stopped to have lunch.
  • It took her 36 minutes to eat lunch.

∴ Time at which Dev finishes her lunch =

                  9:52 A.M.  + ( 1 hour and 48 minutes +  36 minutes )

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