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
Brilliant_brown [7]
3 years ago
6

Does the quadratic function

Mathematics
1 answer:
Rama09 [41]3 years ago
6 0

Answer:

Two real roots

Step-by-step explanation:

The portion of the quadratic formula that determines the number of roots is

b² - 4ac

If it's positve there are two real roots

If it's zero there is one real root

If it's negative there are no real roots

------------------------------

b² - 4ac = 7² - 4(3)(-8)

b² - 4ac =  49 + 96

b² - 4ac =  145

Two real roots since 145 is positive

You might be interested in
A survey was conducted that asked 1011 people how many books they had read in the past year. results indicated that x overbarequ
Tcecarenko [31]
Since we do not know the population standard deviation, we will use the t-distribution to construct the 90% confidence interval of the mean number of books people read. The value of t_{\frac{\alpha }{2}} with 1010 degrees of freedom and with alpha equals to 0.10 is 1.64

First, we need to solve for the margin of error, E.
     E=t_{\frac{\alpha }{2}}\cdot \frac{s}{\sqrt{n}}=1.64\cdot \frac{16.6}{\sqrt{1011}}=0.86

The lower bound of the confidence interval is 
     LB=\overline{x}-E=14.8-0.86=13.94

The upper bound of the confidence interval is 
     LB=\overline{x}+E=14.8+0.86=15.66

Therefore, the 90% confidence interval is (13.94, 15.66).

We are 90% confident that the interval from 13.94 books to 15.66 books does contain the true value of the population mean number of books people read. 


4 0
4 years ago
T-7=19 what is the answer and how do you do it
jeka57 [31]
T=26
you just add 7 to the other side with 19 which gives you the answer
7 0
3 years ago
Carlos has scored 83, 65, and 94 on his previous three tests. What score does he need on his next test so that his average (mean
Brilliant_brown [7]

Answer:

  • Carlos need to score 95

Step-by-step explanation:

<u>Let the score is x. The average is:</u>

  • (83 + 56 + 94 + x)/4 = 82
  • x + 233 = 4*82
  • x = 328 - 233
  • x = 95
8 0
3 years ago
Hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii​
Alexus [3.1K]

Answer:

hiiiiiiiiiiiiiiiiiiii thnk you so much

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Find the slope I need help
slavikrds [6]

Answer:

m = 7 / 21 = 1 / 3 = 0.33333

7 0
3 years ago
Read 2 more answers
Other questions:
  • Solve the eduations
    11·1 answer
  • Please help me
    10·2 answers
  • The cost of importing five dozen china dinner sets, billed at $32 per set, and paying a duty of 40%, is
    5·1 answer
  • A delegation of 3 is selected from a city council made up of 4 liberals and 5 conservatives. What is the expected number of libe
    15·1 answer
  • Find the perimeter of the figure.
    7·1 answer
  • A population proportion is 0.57. Suppose a random sample of 657 items is sampled randomly from this population.
    10·1 answer
  • What would y be? please show me how do to it also so I can understand.
    12·2 answers
  • A kitchen floor has 15 1/2 tiles in an area of 2 1/5 square feet. How many tiles are in one square foot?
    13·2 answers
  • What is the value of a^(m-n) *​
    15·1 answer
  • Fifty-four percent of the students in your class have moved at least one
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!