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Greeley [361]
3 years ago
7

Plz I need this done by the hour!!!

Mathematics
1 answer:
RideAnS [48]3 years ago
6 0

Answer:?

Step-by-step explanation:

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The axis of symmetry for the graph of the function f(x)=3x2+bx+4 is x = 3. What is the value of b?
Kobotan [32]

Answer:

A)-18

Step-by-step explanation:

Given a quadratic equation of the form y=ax^2+bx+c, the axis of symmetry is determined by the formula x=-\frac{b}{2a}.

If the axis of symmetry of the equation: f(x)=3x^2+bx+4 is 3, then:

a=3, b=?, x=3

x=-\frac{b}{2a}\\3=-\frac{b}{2*3}\\b=-6X3=-18

The correct option is A.

7 0
4 years ago
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USING SUBSTITUTION, WHAT IS <br> Y=-×-6<br> Y=×-4
11Alexandr11 [23.1K]

Answer:

x=-1, y=-5. (-1, -5).

Step-by-step explanation:

y=-x-6

y=x-4

----------

-x-6=x-4

-x-x-6=-4

-2x-6=-4

-2x=-4+6

-2x=2

x=2/-2

x=-1

y=-1-4

y=-5

4 0
4 years ago
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Suppose that a population begins at a size of 100 and grows continuously at a rate of 200% per year. Give the formula for calcul
Lady bird [3.3K]

Answer:

D)

Step-by-step explanation: Im not so sure ok i sorry if Im wrong

3 0
3 years ago
Select the graph of the quadratic function ƒ(x) = x2 + 3. Identify the vertex and axis of symmetry
inna [77]
To find the vertex of a quadratic function, you need to 'complete the square';
Completing the square gives a quadratic in another form;
For quadratics that have an x² coefficient of 1 as is the case, it is a simple matter to complete the square:
For the quadratic x² + bx + c
Simply, put x added to half the coefficient of the x term (b/2) in a bracket and square the bracket;
Then add the constant (c) and the square of the half the coefficient of the x term (b/2), so:
(x + d)² + e, where d is a (rational) number to be identified;
d = b/2
e = d² + c

So, for f(x) = x² + 0x + 3:
Then the completed-the-square form is: f(x) = (x + 0)² + 3
As it happens, this quadratic function has a common normal form and completed-the-square form because the x-coefficient is 0.

The vertex coordinates are, according to the general format given above:
(-d, e).
So, looking at completed-the-square form for the function in question, we can tell the vertex is at the coordinates: (0, 3)

Quadratic functions always have symmetry about the vertical line with the x-coordinate of the vertex;
This makes sense if you think about how the graph looks (u-shaped);
Therefore for our function, the vertex is:
x = 0 (a vertical line with the x-coordinate of the vertex).
6 0
3 years ago
What is the volume of the figure ?
vivado [14]

Answer:

44,602.2 (c)

Step-by-step explanation:

The volume of a sphere is found by using the equation:

\frac{4}{3} \pi r^{3}

The radius is shown to be 22cm just plug it in and see that the equation produces the value: 44,602.2

3 0
3 years ago
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