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4 years ago

Can someone check my answer?

1 answer:

8 0

<span>The equation for a parabola is y = ax^2+ bx + c In this example, y = x^2 - 4x + 3 a = 1 b = -4 c = 3 Because "a" is a positive number, the parabola will open upwards and the vertex will be a minimum (at the bottom). To find the vertex, use x = -b/2a x = -(-4) / 2 (1) x = 4 / 2 x = 2 Then solve for y using x = 2 y = x^2 - 4x + 3 y = 2^2 - 4(2) + 3 y = 4 - 8 + 3 y = -1 Therefore the vertex (x,y) is at (2, -1) To find the x intercept, let y = 0 and solve for x. y = x^2 - 4x + 3 0 = x^2 - 4x + 3 0 - (x^2 - 4x + 3) = x^2 - 4x + 3 - (x^2 - 4x + 3) -x^2 + 4x - 3 = 0 Factor left side of equation: (-x + 1)(x - 3) = 0 Therefore -x + 1 = 0 or x - 3 = 0 x = 1 or x = 3 The x intercepts are (1,0) and (3,0).</span>

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Determine whether the figure has line, point, and/or rotational symmetry.

Harman [31]

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Step-by-step explanation:

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3 years ago

Question 15 of 20 :

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Step-by-step explanation:

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3 years ago

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Dmitry [639]

It is $11.25 Per person

I believe. Because of the typing of this, it was hard to determine what the answer was. It would have helped if it was a little clearer

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4 years ago

Find the remainder when x51+x is divided by x+1

kaheart [24]

Answer:

-2

Step-by-step explanation:

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3 0

4 years ago

A retailer who sells fashion boots estimates that by selling them for x dollars each, he will be able to sell 70−x boots each we

Marat540 [252]

Answer: $35 is the selling price and $1225 is the maximum revenue.

Step-by-step explanation:

Since we have given that

$R(x)=-x^2+70x$

We need to find the maximum revenue.

So, We will first derivative it w.r.t. x.

So, it becomes,

$R'(x)=-2x+70$

Now, we will find critical points.

So, R'(x) = 0

So, it becomes,

$-2x+70=0\\\\-2x=-70\\\\x=\dfrac{70}{2}=35$

Now, to check whether it yields maximum revenue or not.

So, second derivative w.r.t. x, we get that

R''(x) = -2<0

So, At $35, it yields maximum revenue.

Amount of maximum revenue would be

$R(35)=-(35)^2+70\times 35=-1225+2450=\$1225$

Hence, $35 is the selling price and $1225 is the maximum revenue.

7 0

3 years ago