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I am Lyosha [343]
3 years ago
14

What is the answer to number 6? Please break it down and explain.

Mathematics
1 answer:
snow_tiger [21]3 years ago
8 0

Answer:

-2 or -5

Step-by-step explanation:

(2x − 8) / (x² + 7x + 10) is an invalid expression when the denominator is 0.

x² + 7x + 10 = 0

(x + 2) (x + 5) = 0

x = -2 or -5

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A math class is having a discussion on how to determine if the expressions 4x-x+5 and 8-3x-3 are equivalent using
Mkey [24]

Answer:

  Both expressions should be evaluated with two different values. If for each substituted value, the final values of the expressions are the same, then the two expressions must be equivalent.

Step-by-step explanation:

Both expressions are linear expressions. It takes 2 points to define a line. If the lines defined by each expression go through the same two points, then the expressions are equivalent.

If the expressions have the same value for two different variable values, they are equivalent. (choice D)

_____

<em>Additional comment</em>

One more point is needed than the degree of the polynomial expression. That is, quadratic (degree 2) expressions will be equivalent if they go through the same 2+1 = 3 points.

6 0
3 years ago
What is 4.345 x 10^5 in standard form?
zalisa [80]

Answer:

Choice D.)   434,500

Step-by-step explanation:

What is 4.345 x 10^5 in standard form?

4.345 x 10^5 = 4.345 *  100,000

multiply it out:

4.345 x 10^5 = 434,500

3 0
3 years ago
A total of 70 tickets were sold for a concert and earn the organizers $804. If the cost of each ticket is either $10 or $12, how
crimeas [40]

Answer:

52 tickets cost $10 and 18 tickets cost $12

Step-by-step explanation:

10x+12y=804. (1)

x+y=70. (2)

From (2)

x=70-y

Substitute x=70-y into (1)

10x+12y=804

10(70-y)+12y=804

700-10y+12y=804

700+2y=804

2y=804-700

2y=104

y=104/2

y=52

Recall

x+y=70

x+52=70

x=70-52

x=18

52 tickets cost $10 and 18 tickets cost $12

5 0
3 years ago
Name the point with the given coordinates
siniylev [52]

Answer:

wheres the picture?

Step-by-step explanation:

5 0
2 years ago
In a sample of students, 125 said they exercise on a regular basis. How large was the sample if 27.3% said they exercised on a r
krek1111 [17]

First, let's declare a variable

x = # of students

Now, let's create an equation to model the problem.

x * 0.273 = 125

Divide both sides by 0.273

x = 457.8 = 458 students.

Note, I rounded to the nearest whole number.

5 0
2 years ago
Read 2 more answers
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