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Marianna [84]
3 years ago
15

Ashlynn played six rounds of golf. Her scores were 72, 79, 74, 76, 76, and 75. She really wants to have a mean of 75 after her n

ext round of golf. What must she shoot in order to have a mean of 75?
72
75
66
73
Mathematics
1 answer:
kvasek [131]3 years ago
8 0

Answer:

73

Step-by-step explanation:

Set up as if you're finding the average:  total the 6 scores and add 'x', then divide by 7 and set this equal to 75

'x' = score she must meet or exceed to achieve an average of 75

<u> 452 + x </u> = 75

     7

cross-multiply:  452 + x = 75(7)

452 + x = 525

x = 73

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Given a quadratic function in standard format (y = ax² + bx + c), the direction of the parabola is as follows:

  • if "a" is positive, then opens UP
  • if "a" is negative, then opens DOWN

Given a quadratic function in standard format (y = ax² + bx + c), the vertex can be found as follows:

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  • y-value is found by plugging in the AOS for "x" in the equation

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1) y = x² + 11x + 24

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The graph should contain the vertex, x-intercepts (-3, 0) and (-8, 0), and y-intercept (0, 24)

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2) y = -x² - 6x - 8

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This could NOT be the graph of the rain gauge.

The graph should contain the vertex, x-intercepts (-2, 0) and (-4, 0), and y-intercept (0, -8)

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