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3 years ago

HELP ASAP WILL GIVE BRAINLIEST

Mathematics

1 answer:

Alona [7]3 years ago

6 0

Answer:

y=2 $x^{2}$ -7x-4

three linear equations

c=-4 ;4a+b=1 ; 9=a-b

Step-by-step explanation:

Simply assume a standard parabola equation y=a $x^{2}$ +bx +c

(here a, b, c are three independent variables)

Three coordinates as shown in graph are (0,4), (4,0) ,(-1,5)

Now put these points in the equation of parabola and get three linear equations.

[1] c=-4

[2] 4a+b=1

[3] 9=a-b

Now substitute value of a from equation 2 into 3 in terms of b

a= $\frac{1-b}{4}$

9= $\frac{1-b}{4}$ -b

b=-7

a=2

y=2 $x^{2}$ -7x-4

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3 years ago

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nignag [31]

Step-by-step explanation:

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3 years ago

A well of diameter 4m is dug 14m deep. The earth taken out is spread evenly all around the well to form a 40cm high embankment.

dimulka [17.4K]

Answer:

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Step-by-step explanation:

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= 3.142*7*7*14

= 2,155.41m³

Now that we hav the volume of earth, we go on to find the raduis of the spread

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8 0

3 years ago

A wire 31ft long is stretched from the top of a flagpole to the ground at a point of a flagpole to the ground at a point 15ft fr

Nat2105 [25]

Answer:the height of the flagpole is 27.12 ft

Step-by-step explanation:

The wire makes an angle with the ground and forms a right angle triangle with the flag pole. The length of the wire represents the hypotenuse of the right angle triangle. The height of the flag pole and the ground distance from the wire represents the adjacent and opposite sides respectively.

To determine the height of the flagpole, x we would apply Pythagoras theorem which is expressed as

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3 years ago

Independent Practice

Sedbober [7]

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Step-by-step explanation:

Graph.

y = 5 x − 2

{ − 5 , − 1 , 0 , 2 , 10 }

The chosen topic is not meant for use with this type of problem. Try the examples below.

1 , 2 , 2 , 2 , 3 , 4 , 4 , 5 , 8 , 9 , 10

11 , 14 , 14 , 17 , 17 , 17 , 41 , 44 , 47 , 71 , 74 , 77

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