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4 years ago

If ƒ (x ) = 2x 2 + 3, find ƒ (3). A.31 B.15 C.21 D.39

2 answers:

5 0

Just plug in what x equals, as they tell you.

f(x) = 2x² + 3 f(3)

f(3) = 2(3²) + 3
f(3) = 2(9) + 3
f(3) = 18 + 3
f(3) = 21

c. 21 is your answer

hope this helps, God bless!

nlexa [21]4 years ago

3 0

F(3)=2*3²+3=18=3=21
C is the answer

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In the polynomial below, what number should replace the question mark to produce a difference of squares?

Stella [2.4K]

A polynomial is an algebraic equation that consists of more than one term. Otherwise, it is called a monomial. The technique in producing a difference of the squares is completing of the squares method. For a quadratic formula with a general form of ax2 + bx + c = 0, you can determine c such that the formula could be factored into two monomials. The equation would be (b/2)^2.

For example, if the equation is x^2 + 2x+ __ = 0, c is solved as follows:

c = (2/2)^2 = 1

The equation would be x^2 + 2x +1 = 0. When you simplify and factor it out, the equation would become (x+1)^2 = 0.

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3 years ago

Alek and Ann start walking around a track at the same time and at the same place. It takes Ann 6 minutes to walk around the trac

Yuki888 [10]

Answer:

3 3/7 minutes

Step-by-step explanation:

This calculated using the formula:

1/x + 1/y = 1/n

Where

x = Number of minutes it took Ann to walk = 6 minutes

y = Number of minutes it took Alek to walk = 8 minutes

n = Number of minutes it would take An and Alek to reach the starting point at the same time

1/6 + 1/8 = 1/n

Lowest Common Denominator = 24

4 + 3/24 = 1/n

7/24 = 1/n

Cross Multiply

7n = 24

n = 24/7

n = 3 3/7 minutes

It would take them 3 3/7 minutes to reach the starting point at the same time.

3 0

3 years ago

kozerog [31]

Answer:

I didn't know the anwer but I need to answer atleast two sorry

Step-by-step explanation:

idk

6 0

4 years ago

Find x for,<br> sin⁻¹ 4x + sin⁻¹ 3x = -<img src="https://tex.z-dn.net/?f=%5Cfrac%7B%5Cpi%20%7D%7B2%7D" id="TexFormula1" title="\

Novay_Z [31]

<h2>Explanation:</h2><h2></h2>

Let's solve this problem graphically. Here we have the following equation:

$sin^{-1}(4x) + sin^{-1}(3x) = -\frac{\pi}{2}$

So we can rewrite this as:

$f(x)=sin^{-1}(4x) + sin^{-1}(3x) \\ \\ g(x)= -\frac{\pi}{2}$

So the solution to the equation is the x-value at which the functions f and g intersect. In other words:

$f(x)=g(x) \\ \\ sin^{-1}(4x) + sin^{-1}(3x) = -\frac{\pi}{2}$

Using graphing calculator, we get that this value occurs at:

$\boxed{x=-0.2}$

3 0

4 years ago

Which quadrilateral is a trapezoid?

Alex_Xolod [135]

The quadrilateral with two sides parallel and the other two sides intersecting is a trapezoid.

<h3>What is a trapezoid?</h3>

The figure with the four sides and the sum of the angles with 360 degrees are called a quadrilateral.

A trapezoid is a quadrilateral because it has four sides and the sum of the angles of all the sides is 360 degrees. The quadrilateral is a trapezoid because it has two sides parallel and the other two sides are intersecting.

Therefore the quadrilateral with two sides parallel and the other two sides intersecting is a trapezoid.

To know more about trapezoids follow

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4 0

2 years ago