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2 years ago

For which rational expression is –2 an excluded value of x?

Mathematics

1 answer:

Kipish [7]2 years ago

5 0

Answer:

option a is the answer

Step-by-step explanation:

put the value of x in each expression as x = -2

you'll see that in option a the expression becomes

$\frac{x - 3}{ {x}^{2} - 4} = \frac{ - 2 - 3}{ {( - 2)}^{2} - 4} \\ = \frac{ - 5}{4 - 4} \\ = \frac{ - 5}{0}$

which is not defined. hence -2 is excluded value

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Three points are colinear.<br> always<br> sometimes <br> never

Novosadov [1.4K]

Three or more points are collinear, if slope of any two pairs of points is same. With three points A, B and C, three pairs of points can be formed, they are: AB, BC and AC. If Slope of AB = slope of BC = slope of AC, then A, B and C are collinear points

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2 years ago

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2 years ago

Tim looks up at the top of a tree at an angle of elevation of 40 degrees. If heis 5 ft tall and 10 ft from the tree, how tall is

dolphi86 [110]

<h2>Answer:</h2>

13.391 ft

<h2>Explanations:</h2>

The schematic diagram of the given question is shown below;

The height of the tree is expressed as:

H = h +5

Determine the value of h using the SOH CAH TOA identity

$\begin{gathered} tan\theta=\frac{opposite}{adjacent} \\ tan40^0=\frac{h}{10} \\ h=10tan40 \\ h=10(0.8391) \\ h=8.391ft \\ \end{gathered}$

Determine the height of the tree

$\begin{gathered} H=h+5 \\ H=8.391+5 \\ H=13.391ft \end{gathered}$

Hence the height of the tree is 13.391ft

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5 months ago

Solve the proportion 18/30 = 12/n. what does N equal?

natita [175]

So you are going to want to cross multiply getting 18x=360 then from there you divide gettin x=20

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2 years ago

Given h(x)=4x+3h , find h(-1)

satela [25.4K]

Answer:

h(-1) = <u>-7</u>

Step-by-step explanation:

use brackets while doing calculations
steps are clearly shown in the photo

hope this helped , if i helped you in acquiring the correct answer please tag me brainliest than... have a nice day ♡

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2 years ago