4 years ago

7 apples cost 4.55 dollars how much do 9 apples cost

1 answer:

7 0

To calculate how much 9 apples cost, you must multiply 9 to 4.55 and then divide by 7. This is done by setting up a proportion.

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Find the vertex and axis of symmetry for f(x)=2x^2-1

vfiekz [6]

<h3>Axis of symmetry is 0 and vertex is (0, -1)</h3>

Solution:

Given is:

$f(x) = 2x^2 - 1$

We have to find the vertex and axis of symmetry

The general equation is given as:

$f(x) = ax^2 + bx + c$

Comparing with given equation,

a = 2

b = 0

c = -1

The axis of symmetry is given as:

$x = \frac{-b}{2a}$

$x = \frac{0}{2(2)}\\\\x = 0$

Thus axis of symmetry is 0

The x coordinate of the vertex is the same

x coordinate of the vertex = 0

h = 0

The y coordinate of the vertex is:

k = f(h)

k = f(0)

$f(0) = 2(0) - 1\\\\f(0) = 0 - 1\\\\f(0) = -1$

Thus, y coordinate of the vertex is -1

Therefore, vertex is (0, -1)

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3 years ago

What is 2+3 +4 plz answer the problem

Ilia_Sergeevich [38]

OMG!!! 2+3+4 is 9 so your answer is 9

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Write the point-slope form of the line that passes through (6, 1) and is parallel to a line with a slope of -3. Include all of

VashaNatasha [74]

Answer:

y - 1 = -3(x - 6)

Step-by-step explanation:

Use the point-slope equation:

y - b = m(x - a)

where the line passes through the point (a, b) and has slope m:

y - 1 = -3(x - 6)

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If the area of a circle is 81 pie What is the radius of the circle?

Rama09 [41]

Answer-
40.5
Explanation-
Radius should be the half of the area, I guess..

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Answer:

Step-by-step explanation:

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