For which values of x are the following expressions undefined?1.1- 3x + 7

Mathematics

2 answers:

Dahasolnce [82]3 years ago

6 0

Answer:

please send the question completely

gladu [14]3 years ago

5 0

<h2><u><em>Answer: To find the values that make a rational expression undefined, set the denominator equal to zero and solve the resulting equation. Example: 0 7 2 3 x x − Is undefined because the zero is in the denominator.</em></u></h2><h2><u><em></em></u></h2><h2><u><em>This should make it ez for you hope you do a good job on the quiz/test/project/homework</em></u></h2><h2><u><em></em></u></h2><h2><u><em></em></u></h2><h2><u><em>-Tay did this</em></u></h2><h2><u><em></em></u></h2><h2><u><em></em></u></h2><h2><u><em></em></u></h2><h2><u><em></em></u></h2><h2><u><em></em></u></h2><h2><u><em></em></u></h2><h2><u><em>can i get the brain thing pls</em></u></h2>

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What is the minimum number of points that could be moved to make the parallelogram a<br> rectangle?

scoray [572]

Answer:

Step-by-step explanation:

If we have the length and the breadth of a rectangle then we can draw a unique rectangle because we know already that all the vertex angles are equal to 90 degrees. Hence, only two measurements are required.

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2 years ago

If you are offered one slice from a round pizza (in other words, a sector of a circle) and the slice must have a perimeter of 24

VARVARA [1.3K]

Answer:

A 12 in diameter will reward you with the largest slice of pizza.

Step-by-step explanation:

Let $r$ be the radius and $\theta$ be the angle of a circle.

According with the graph, the area of the sector is given by

$A=\frac{1}{2}r^2\theta$

The arc lenght of a circle with radius $r$ and angle $\theta$ is $r \theta$

The perimeter of the pizza slice is composed of two straight pieces, each of length r inches, and an arc of the circle which you know has length s = rθ inches. Thus the perimeter has length

$2r+r\theta=24 \:in$

We need to express the area as a function of one variable, to do this we use the above equation and we solve for $\theta$

$2r+r\theta=24\\r\theta=24-2r\\\theta=\frac{24-2r}{r}$

Next, we substitute this equation into the area equation

$A=\frac{1}{2}r^2(\frac{24-2r}{r})\\A=\frac{1}{2}r(24-2r)\\A=12r-r^2$

The domain of the area is

$0$

To find the diameter of pizza that will reward you with the largest slice you need to find the derivative of the area and set it equal to zero to find the critical points.

$\frac{d}{dr} A=\frac{d}{dr}(12r-r^2)\\A'(r)=\frac{d}{dr}(12r)-\frac{d}{dr}(r^2)\\A'(r)=12-2r$