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ohaa [14]
3 years ago
15

Y=-x^2+20x-64 what is the max height

Mathematics
1 answer:
Inessa [10]3 years ago
8 0

Answer:

36

Step-by-step explanation:

The maximum height is the y-coordinate of the vertex

given a quadratic in standard form : ax² + bx + c : a ≠ 0

then the x-coordinate of the vertex is

x_{vertex} = - \frac{b}{2a}

y = - x² + 20x - 64 is in standard form

with a = - 1, b = 20 and c = - 64, hence

x_{vertex} = - \frac{20}{-2} = 10

substitute x = 10 into the equation for y

y = - (10)² + 20(10) - 64 = 36 ← max height


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8 - 5 5/6 = 2 1/6

So 2 1/6 of the board is left over.
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Which of the following graphs represents the equation y-2 = 3(x - 1)?
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Can someone answer this question and give an explanation
Temka [501]

Answer:

48cm^2

Step-by-step explanation:

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Hope this helped!

7 0
1 year ago
Read 2 more answers
URGENT: the question is in the attachment below
joja [24]

Simultaneous equation refer to a pair of equations that are solved at the same time.

<h3>What is a simultaneous equation?</h3>

A  simultaneous equation refer to a pair of equations that are solved at the same time.

For problem 1;

x = 4 - y ------ (1)

y^2 = 3x + 19 ----- (2)

Substitute (1) into (2)

y^2 = 3(4 - y) + 19

y^2 = 12 - 3y + 19

y^2 +3y - 31 =0

y = 4.27 or -7.27

x = 4 - 4.27 = 0.27

or

x = 4 - (-7.27) = 11.27

For the second problem;

x = 7 - y

y^2 = 5x - 15

Substitute (1) into (2)

y^2 = 5(7 - y) - 15

y^2 =35 -5y -15

y^2 + 5y - 20 = 0

y =2.62 or -7.62

x = 7 - 2.62 = 4.38

OR

x=  7 - (-7.62) = 14.62

Learn more about simultaneous equation:brainly.com/question/16763389

#SPJ1

8 0
2 years ago
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