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trapecia [35]
3 years ago
12

80% of __ is 16 help

Mathematics
2 answers:
S_A_V [24]3 years ago
4 0

Answer:

80% of 20 is 16.

Step-by-step explanation:

Irina-Kira [14]3 years ago
3 0

Hello darling, the answer is 20 ^^

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Step-by-step explanation:

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tino4ka555 [31]

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A parabola with the vertex at (1.5, 12.5) inscribes a segment of length 5 on x-axis. What is the area of the triangle formed by
damaskus [11]

Answer:

  20 units²

Step-by-step explanation:

The x-intercepts are symmetrically located around the x-coordinate of the vertex, so are at

  1.5 ± 5/2 = {-1, 4}

Using one of these we can find the unknown parameter "a" in the parabola's equation (in vertex form) ...

  0 = a(4 -1.5)² +12.5

  0 = 6.25a +12.5 . . . . . simplify

  0 = a +2 . . . . . . . . . . . divide by 6.25

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Then the standard-form equation of the parabola is ...

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  y = -2x² +6x +8

This tells us the y-intercept is 8. Then the relevant triangle has a base of 5 units and a height of 8. Its area is given by the formula ...

  A = (1/2)bh = (1/2)(5)(8) = 20 . . . . units²

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3 years ago
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Step-by-step explanation:

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