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
serg [7]
3 years ago
15

The roots of a quadratic function are -2 and -6

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
5 0

Step-by-step explanation:

The factors are x + 2 and x + 6.

You might be interested in
1 point
postnew [5]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

(3 \times 25 )+ 60 = 75 + 60 =

135

Thus Lisa spent 135 $ .

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

3 0
3 years ago
Read 2 more answers
How many people were surveyed in the bar graph 9 30 18 25​
Helga [31]

Answer:

30

Step-by-step explanation:

9 + 9 + 6 + 5 + 1 = 30

5 0
3 years ago
In a data distribution, the first quartile, the median and the means are 30.8, 48.5 and 42.0
kolbaska11 [484]

Answer:

Q_3 = 56.45 --- The third quartile

Var = 370.18 -- Variance

Step-by-step explanation:

Given

Q_1  =  30.8 -- First quartile

Q_2 =  48.5 --- Median

\bar x = 42 --- Mean

Skp = -0.38 --- Coefficient of skewness

Solving (9): The third quartile Q_3

This is calculated from

Skp =  \frac{Q_1   + Q_3  - 2Q_2}{Q_3 - Q_1}

So, we have:

-0.38 =  \frac{30.8 + Q_3- 2*48.5}{Q_3 - 30.8}

Cross Multiply

-0.38 (Q_3 - 30.8)=  30.8 + Q_3- 2*48.5

Open bracket

-0.38Q_3 + 11.704=  30.8 + Q_3- 97.0

Collect like terms

-0.38Q_3 -Q_3=  30.8 - 97.0- 11.704

-1.38Q_3=  -77.904

Divide both sides -1.38

Q_3 = \frac{-77.904}{-1.38}

Q_3 = 56.45 --- approximated

Solving (b): The variance

First, calculate the standard deviation from:

3IQR  = 4SD

IQR= Q_3 - Q_1

So:

3IQR  = 4SD

3(Q_3 - Q_1) = 4SD

Make SD the subject

SD = \frac{3}{4}(Q_3 - Q_1)

SD = \frac{3}{4}(56.45 - 30.8)

SD = \frac{3}{4}*25.65

SD = \frac{3*25.65}{4}

SD = \frac{76.95}{4}

SD = 19.24

So, the variance is:

Var = SD^2

Var = 19.24^2

Var = 370.18

5 0
3 years ago
Simplify. (-√7)(-√7)
Savatey [412]

Answer:

<em><u>7</u></em>

Step-by-step explanation:

(-√7)(-√7)

(-\sqrt{7})^2

(\sqrt{7})^2

<em><u>7</u></em>

<em><u /></em>

<em><u>Please Mark As Brainliest</u></em>

5 0
3 years ago
A model rocket launched directly upward at a speed of 16 meters per second from a helght of 2 meters . The f(t) = - 4.9t ^ 2 + 1
Anton [14]

Answer:

f(t) = 15.06 m

Step-by-step explanation:

The relationship between the height of the rocket and the time after launch, t. In seconds is given by :

f(t) = - 4.9t ^ 2 + 16t + 2

We need to find the maximum height the rocket will reach the ground.

When it reaches the ground,

f(t) = 0

So,

Maximum height,

f'(t) = 0

-9.8t+16=0\\\\t=\dfrac{16}{9.8}\\\\t=1.63\ s

Put t = 1.63 in equation (1).

f(1.63) = - 4.9\times (1.63 ^ 2) + 16(1.63) + 2\\\\=15.06\ m

So, the maximum height of the rocket is 15.06 m.

4 0
3 years ago
Other questions:
  • 1 the sum of the binomials 3 + 2x and 4 – 5x. Explain how you can use the
    7·2 answers
  • What would be my slope? Please answer quickly
    11·1 answer
  • The sum of two numbers is 39 . The larger number is 5 more than the smaller number. What are the numbers?
    9·1 answer
  • Your watch stops at 4 PM on Monday. How many hours and minutes would it be off at 5:30 PM. Tuesday?
    14·2 answers
  • If the density of the mantle rock is about 3.3 g/cm3, then what is its specific gravity?
    6·2 answers
  • Please answer this question for brainliest!
    5·2 answers
  • after 3 hours, ernie had travelled 295 miles. if he travels at a constant speed, how far will he have travelled after 5 hours?
    11·2 answers
  • Need help on this please
    5·1 answer
  • -g+2(3+g)=-4(g+1) answer please?
    14·1 answer
  • A quantity with an initial value of 130 decays exponentially at a rate such that the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!