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
SCORPION-xisa [38]
2 years ago
5

5. Factor: x² - 4x-21

Mathematics
2 answers:
tekilochka [14]2 years ago
8 0

Answer:

(x - 7) (x + 3)

Step-by-step explanation:

masha68 [24]2 years ago
5 0
The answer is x² - 25

first you have to subtract the x² - 4x-21. And you get this x² - 25


You might be interested in
Suppose that F is an inverse square force field below, where c is a constant.
Andre45 [30]

Answer:

Forces in our Universe

Step-by-step explanation:

a)

First of all we have,

F(r) = \frac{cr}{|r|^{3} }

and,

r = xi+yj+zk

We need to define a function that allows us to find said change based on r, so one of the functions that shows that change is,

f(r) = - c /|r|

That is,

\nabla f = F

For this case F is a conservative field and the line integral is independent of the path. Thus, defining  P_{1} = (x_{1}, y_{1}, z_{1}) and P_{2} = (x_{2}, y_{2}, z_{2}) . So the amount of work on the movement of the object from P1 to P2 is,

W=\int\limits_c  {F} \, dr

W= f(P_{1}-P_{2})

W= \frac{c}{(x_{2}^2+ y_{2}^2+ z_{2}^2)^{1/2} } -\frac{c}{(x_{1}^2+ y_{1}^2+ z_{1}^2)^{1/2}}

W= c(\frac{1}{d1}-\frac{1}{d2}  )

2) The gravitational force field is given by,

F(r) =-\frac{mMGr}{ |r|^3}

The maximum distance from the earth to the sun is 1.52*10 ^ 8 km and the minimum distance is 1.47*10 ^ 8km. The mass values of the bodies are given by m = 5.97*10 ^ {24}kg, M = 1.99 *19 ^ {30}kg and the constant G is 6.67 * 10 ^{ -11 } \frac{Nm ^ 2}{kg^2}

In this way we raise the problem like this,

c= -mMG

W= -mMG (\frac{1}{1.52*10 ^ 8} -\frac{1}{1.47*10 ^ 8} )

W= -(5.95*10^{24})(1.99*10^{30})(6.67*10^{-11})(-2.2377*10^{-10})

W \approx 1.77*10^{35}}J

5 0
3 years ago
I need some DETAILED examples of Dividing Integers! Urgent, pls help ASAP!
vfiekz [6]

Here are some examples:

Integers are positive and negative numbers, but dividing integers are dividing positive and negative numbers:

Remember these rules:

  1. Negative divided by a negative equals a positive.
  2. Negative divided by a positive equals a negative.
  3. Positive divided by a positive equals a positive .

Examples:

  • -4 \div 2 = -2
  • -4 \div -4 = 1
  • 4 \div 2 = 2

Hope this helps!

8 0
3 years ago
Five sevenths times seven thirds
lord [1]

5/7 x 7/3

Multiply the numerators together and the denominators:

(5 x 7) / (7 x 3)

35/21 reduces to 5/3 = 1 2/3

3 0
3 years ago
50 POINTS. help I'm not rushing so late answers are appreciated!
Flura [38]

Answer:

"The data is discrete, so the graph is a series of unconnected points."

4 0
3 years ago
Read 2 more answers
A regular pentagon has side lengths of 10 cm and an
Fittoniya [83]

Answer: 172 square centimeters.

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

Area of a pentagon (A) = 1/2× 5s × a

Where:

s : side of the pentagon

a: apothem

Replacing with the values given and solving for A (area):

A =1/2 x (5 x10) x 6.88

A = 172 square centimeters.

Feel free to ask for more if needed or if you did not understand something.

7 0
3 years ago
Other questions:
  • Is this right? I’m confused for answering either B or C.
    5·2 answers
  • Mandy's new baby sister weighs 8 1/2 lb. when mandy was born, she weighed 116 oz. what is the difference in their two birth weig
    6·1 answer
  • What are the constant terms in the expression?<br> 8m−5n+2+m−14
    10·2 answers
  • I need help with this please....Thanks
    5·1 answer
  • Which fraction is not equivalent to 9/12<br><br> a.24/32<br> b.6/8<br> c.15/20<br> d.16/24
    8·1 answer
  • How do you solve 0.75(8+e)=2−1.25e?
    10·1 answer
  • What is 1+1 i need help hurry
    8·1 answer
  • Please help me on this for my quiz: If the point (2, -10) lies on the graph of a direct variation, which represents the direct v
    11·1 answer
  • 9. 32, Ł,522,
    12·1 answer
  • Milo drove 9 kilometres from his house to Speedville. Speedville is 15 kilometres west of River City. From Speedville, Milo drov
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!