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Kamila [148]
3 years ago
7

Simplify the rational expressions. State any excluded values. X^2-4/2-x

Mathematics
1 answer:
tatiyna3 years ago
4 0

Answer:

-x-2;  x\neq2

Step-by-step explanation:

\frac{x^2-4}{2-x}-->

\frac{(x-2)(x+2)}{(2-x)} -->

-(x+2); x CAN'T equal 2, because the denominator of the original fraction would be 0, which would make the term undefined.

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Graph the system of inequalities presented here then use your graph to answer the following questions:
Nookie1986 [14]

Answer:

Part A) The graph in the attached figure (see the explanation)

Part B) The ordered pair is a solution of the system of inequalities (is included in the solution area for the system)

Step-by-step explanation:

Part 1) Graph the system of inequalities

we have

y> 5x+5 ----> inequality A

The solution of the inequality A is the shaded area above the dashed line y=5x+5

The slope pf the dashed line A is positive m=5

The y-intercept of the dashed line A is (0,5)

The x-intercept of the dashed line A is (-1,0)

y>-\frac{1}{2}x+1 ----> inequality B

The solution of the inequality B is the shaded area above the dashed line y=-\frac{1}{2}x+1

The slope pf the dashed line B is negative m=-1/2

The y-intercept of the dashed line B is (0,1)

The x-intercept of the dashed line B is (2,0)

The solution of the system of inequalities is the shaded area above the dashed line A and above the dashed line B

using a graphing tool

see the attached figure

Part B) Is the point (-2, 5) included in the solution area for the system? Justify your answer mathematically

we know that

If a ordered pair is a solution of the system of inequalities, then the ordered pair must satisfy both inequalities

substitute the value of x and the value of y in each inequality

For x=-2, y=5

<em>Verify inequality A</em>

5>5(-2)+5

5>-5 ---> is true

so

The ordered pair satisfy inequality A

<em>Verify inequality B</em>

5>-\frac{1}{2}(-2)+1

5>2 ---> is true

so

The ordered pair satisfy inequality B

therefore

The ordered pair is a solution of the system of inequalities (is included in the solution area for the system)

6 0
3 years ago
1. Mrs. Verner's class has
Dmitrij [34]

Answer:

46.7%

Step-by-step explanation:

Given:

Total number of students in Mrs. Verner's class = 15

Number of girls = 8

To find: percentage are boys

Solution:

Percentage of boys = ( Number of boys / Total number of students ) × 100

Number of boys = Total number of students - Number of girls = 15 - 8 = 7

So,

Percentage of boys = \frac{7}{15} × 100 = 46.7%

3 0
3 years ago
Alex had 23 coins in his collection. He found 5 coins and gave Bill 8 coins. How many coins does Alex have now?
sashaice [31]
Alex has 20 coins now
8 0
3 years ago
Read 2 more answers
Translate 5 times a number decreased by 2 into algebraic equation.
iragen [17]

Hello from MrBillDoesMath!

Answer:             5n - 2  

where "n" is the number mentioned in the problem statement

Thank you,

MrB

3 0
3 years ago
Read 2 more answers
Tape diagram to 5 plus 4​
BigorU [14]

Answer:

9

Step-by-step explanation:

5 plus 4 is 9

3 0
3 years ago
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