1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alexus [3.1K]
3 years ago
8

What is the excluded values? 1. 2x/1-2x 2. -7/x^2 -2x -15

Mathematics
2 answers:
Sophie [7]3 years ago
8 0
Set each denominator equal to zero.
The values of x that cause the expression to be equal to zero are excluded from the domain.


1.
1 - 2x = 0
-2x = -1
x = 1/2

2.
x^2 - 2x - 15 = 0
(x - 5)(x + 3) = 0
x - 5 = 0 or x + 3 = 0
x = 5  or  x = -3
damaskus [11]3 years ago
3 0
The first answer is 1/2. 
the second answers are -3 and 5. 
I just had these questions on a test. I hope this helps you :)
You might be interested in
PLEASE HELP I NEED TO KNOW THE (RIGHT) ANSWER ASAP!
shtirl [24]
Triangles are 180 degrees total so 80+40=120, subtract that from 180 and you’ll get B=60
4 0
3 years ago
Read 2 more answers
What is 22g as a percentage
Nataly_w [17]
Percent equal to 31.43 percent. 
8 0
3 years ago
How do you factor the trinomial 3x^2+18x-21?
snow_lady [41]

Answer:

(3)(x+7)(x-1)

Step-by-step explanation:

3x^2+18x-21

Let's start by taking 3 out of the equation.

3(x^2+6x-7)

Now, when we factor, we need to find two numbers that add up to 6 and multiply to -7.

The numbers would be 7 and -1.

So the factored form of this would be:

(3)(x+7)(x-1)

7 0
3 years ago
A researcher wants to know how professional athletes in her city feel about safety measures. She obtains a list of 952 professio
mojhsa [17]

Answer:

For this case the population represent all the professional athletes in the researcher city and we can assume that the sample size for tis population is N =982 and represent all the individuals of interest for the study and the parameter of interest is the proportion of athletes who believe that the enforcement of safety measures needs to be completely overhauled p.

In order to estimate te parameters of the population the researcher select a sample of 400 professional athletes and just 86 of them returns the questionnaire sent. So then the real sample is the n =86 people who return the info, because the other people are part of the non response rate, and from this sample she found that the proportion of athletes who believe that the enforcement of safety measures needs to be completely overhauled is \hat p=0.76.

Step-by-step explanation:

For this case the population represent all the professional athletes in the researcher city and we can assume that the sample size for tis population is N =982 and represent all the individuals of interest for the study and the parameter of interest is the proportion of athletes who believe that the enforcement of safety measures needs to be completely overhauled p.

In order to estimate te parameters of the population the researcher select a sample of 400 professional athletes and just 86 of them returns the questionnaire sent. So then the real sample is the n =86 people who return the info, because the other people are part of the non response rate, and from this sample she found that the proportion of athletes who believe that the enforcement of safety measures needs to be completely overhauled is \hat p=0.76.

6 0
3 years ago
Which evidence from the text best supports the idea that women astronauts are not unusual anymore?
Ivenika [448]

Answer:

sally ride I guess

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • Explain how you would order from least to greatest three numbers that include a positive number, a negative number , and a zero
    15·2 answers
  • The specific heat of iron is 0.11 cal (g°C) . A cafeteria fork made of iron has a mass of 20 grams. How much heat energy is need
    7·1 answer
  • Reduce the fraction 6x/12x to lowest terms.
    11·2 answers
  • Alana needs 4.62 m of fabric to make curtains. The fabric is sold in tenths of a metre. How much fabric should she buy
    9·1 answer
  • What is 1.3 repeating as a fraction
    7·2 answers
  • Face value of a note payable plus interest is called
    10·2 answers
  • John runs a computer software store. He counted 122 people who walked by his store in a day, 60 of whom came into the stores. Of
    14·1 answer
  • Which of the following is the equation of a line in slope-intercept form for a
    12·1 answer
  • Ms. JEFFERSON SPENT 16 DOLLARS TO BUY 12.8 OUNCES OF SMOKED TROUT. WHAT WAS THE COST PER Ounce?
    14·1 answer
  • 1750 divided by 7
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!