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
Degger [83]
3 years ago
12

B2 - 4ac > 0 means the root is real. True or False

Mathematics
2 answers:
dsp733 years ago
6 0
I'm pretty sure it's true.
attashe74 [19]3 years ago
5 0
This seems to be the dicriminant

when it is positive, that means it has 2 real roots

so the statement is true
You might be interested in
Mexico City, Mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected gro
Cloud [144]

Answer:

Predicted population of Mexico City in year 2010 = 38386000

Step-by-step explanation:

Formula to be used for the population of Mexico,

P = 20.899e^{0.032t}

Where t = Duration after year 1991

P = Final population

Number of years between 2010 and 1991 = 19 years

Predicted population of Mexico city after 2010 = 20.899e^{0.032\times 19}

                                                                              = 20.899 × (1.8368)

                                                                              = 38.38633 million

                                                                              = 38.386 million

Therefore, predicted population of Mexico City in year 2010 = 38386000

5 0
2 years ago
The population of a community is known to increase at a rate proportional to the number of people present at time t. The initial
maks197457 [2]

Answer:

The initial population P0 is 7500

Step-by-step explanation:

First of all, we are told that the population is proportional to time. This means that as time goes by, the population will increase. This type of relationship between two variables has the form of a linear equation expressed as:

y = mx + b,

where m is the slope of the curve and b is the intercept of it.

In this case we can state the following equation:

P = mt + P0

Where P is the population at a certain time "t", "m" is the slope of the curve, "t" is the time (this is the independent variable) and P0 is the intercept of the curve and represents the initial population.

Once we state the equation, let's see what we know:

If t = 0, then P = P0

If t = 3, then P = 12000 just as we are told

and if t = 5, then P = 2 P0 because after five years the population has doubled compared to the initial population (P0).

From the definition of the slope of the curve:

(Y2 - Y1)/(X2-X1) = m

and using the data described before we can formulate the slope value:

m = (2P0 - P0)/(5-0)

m = (2P0 - P0)/5

m = P0/5

Then, let's replace the value of m in the following equation:

P = mt + P0

12000 = (P0/5) × 3 + P0 → This is the equation presented when 3 years has gone by and we now have a population of 12000.

12000 = (3/5) P0 + P0

12000 = (8/5) P0

12000×5/8 = P0 = 7500

Then we can calculate the value of the slope m:

m = P0/5

m = 7500/5 = 1500

Now, knowing the value of m and the initial population P0 we are able to calculate the population at any value of "t".

6 0
3 years ago
A bicycle tire has a radius of 10 inches. To the nearest inch, how far does the tire travel when it makes 4 revolutions?
Aloiza [94]

Answer: 251.2 inches.

Step-by-step explanation: You have to multiply 4*2*π*radius. So, simply multiply 4*2*3.14*10. It would come out as 251.2 inches.

6 0
2 years ago
Help i have math homework and im real bad at it i got a B- last year so help
Natalka [10]
4y-12 is the answer
7 0
2 years ago
Read 2 more answers
Yolanda has finished 45 percent of her homework and she has finished 27 problems. How many problems was Yolanda assigned
masya89 [10]
If 45 percent of the homework is only 27 problems, she needs to figure out this:

What is 47 percent of 60?
              or
47% x 60

Which is 27. 

So, Yolanda was assigned 60 problems.


6 0
2 years ago
Other questions:
  • A package of 12 cans of beans cost $6.84. what is the cost of ONE cost of beans?
    7·2 answers
  • Which expression is equivalent to -3(2m-1)-n?
    7·2 answers
  • How many ninths are in 5.75
    9·1 answer
  • A recent survey of 8,000 high school students found that the mean price of a prom dress was $195.00 with a standard deviation of
    7·2 answers
  • Antonio is ready to move out of his parent's house and live on his own. he found a great apartment that has all utilities includ
    14·2 answers
  • HWEEEPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
    5·1 answer
  • *5 POINTS* plz help i need both of them
    9·1 answer
  • Which of the following statements must be true about the kite shown?
    15·1 answer
  • Х<br> 3х+8<br> Find the value of x
    10·2 answers
  • y= -4x-2y= -4x-5Graph each system. Tell whether the system has A. No solution B. One solution C. Infinitely many solutions D. Ca
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!