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Mila [183]
3 years ago
14

In the figure a is a point on the horizontal ground the angle of Elevation of the top b Of a clock tower from a is 22 degrees if

the horizontal distance between a and B is 30m Find the height of the clock tower correct to three significant figures
Mathematics
1 answer:
erastovalidia [21]3 years ago
6 0

Just do 30  and 22 by  multiplication Step-by-step explanation:

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What are the coordinates of the vertex of the parabola described by the equation below? y = -7(x - 4)2 - 5
pochemuha
To get the vertex of the parabola we proceed as follows;
y=-7(x-4)^2-5
The above can be written as:
y=-7x^2+56x-117
The values of a,b and c are:
a=-7, b=56 and c=-117
x=-b/(2a)
x=-56/(-7*2)=4
but;
y=-7x^2+56x-117
y=-7(4)^2+56(4)-117
y=-5
Thus;
x=4 and y=-5
The vertex will be at point (4,-5)


7 0
3 years ago
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Use the discriminant to determine the nature of the roots of the following equation.
kvv77 [185]

Discussion

The discriminate is b^2 - 4*a*c

The general equation for a quadratic is ax^2 + bx + c

In this equation's case

a = 1

b= -5

c = - 3

Solve

(-5)^2 - 4*(1)*(-3)

25 - (-12)

25 + 12

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Note

Since the discriminate is > 0, the roots are real and different. The roots do exist and there are 2 of them.

4 0
2 years ago
Need helpppppppppp please
aleksley [76]
Adding the two equations
3x + 6y + 3x - 6y = 36+0
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subtracting second equation from first
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12y = 36
y = 3
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therefore
x = 6 and y = 3
(6,3)
8 0
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Ryan has 3/4 of tank of gas in his car. it takes 1/6 of a tank of gas to drive to socccer practice and back home. with the gas i
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I don’t know if this is correct but about 4 times because

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Write the number 2.1 x 10-6 in standard form.
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0.0000021 you need to divide 2.1 by 10^6
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