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
nikitadnepr [17]
3 years ago
8

What are the solutions of x^2+10x+21=0?

Mathematics
2 answers:
Luden [163]3 years ago
6 0
(x+7)(x+3) so therefore you set each equation = 0...
x + 7 = 0
x + 3= 0
and solve
x = -3
x = -7
hammer [34]3 years ago
6 0
<span>x=<span>−7</span>,<span>−3</span></span><span>x=<span>−3</span>,<span>−7
</span></span>These are the only solutions that I could find
You might be interested in
P L E A S E HELP FAST 30 POINTS
kramer
The answer to the question is b
3 0
3 years ago
7х + 2y = -1<br> 3х — 4y = 19
Deffense [45]

Answer:

x = 1, y = -4

Step-by-step explanation:

7х + 2y = -1  ------ eq1

3х — 4y = 19 ------ eq2

multiply eq1 by 2

2 x (7х + 2y = -1)

14x + 4y = -2 -----eq3

by elimination, add equation 2 and 3

14x + 3x = 19-2

17x = 17  (divide both sides by 17)

x = 1  (answer)

substitute into eq1

7(1) + 2y = -1  (subtract 7 from both sides)

2y = -1 -7

2y = -8 (divide both sides by 2)

y = -8/2 = -4 (answer)

3 0
3 years ago
Compute the standard deviation of the following set of data to the nearest whole number: 8, 12, 15, 17, 18
attashe74 [19]
We have that

set of data [<span>8, 12, 15, 17, 18]

step 1
Find the mean
</span>[8+ 12 + 15 + 17 + 18]/5-------> 70/5------> 14

step 2
 for each number: subtract the Mean and square the result
(8-14)²----->36
(12-14)²----> 4
(15-14)²----> 1
(17-14)²----> 9
(18-14)²----> 16

step 3
<span> work out the mean of those squared differences
[36+4+1+9+16]/5-----> 66/5-----> 13.2----> </span><span>this value is called the "Variance"

step 4
</span><span>Take the square root of that
</span>standard desviation=√13.2-----> 3.63-------> 4

the answer is
4
7 0
3 years ago
In thrones science class he is studying cells. Cell A divides every 30 minutes. If Tyrone starts with two cells, how many cells
cupoosta [38]
12 Cells . 6 Because You're Doing Half A Hour For 3 Hours . Then Multiply By 2 . This Answer Will Land You A 6 .
8 0
3 years ago
Find the quotient 6 ÷ 2/7=
mart [117]

6 /\frac{2}{7}

6/2=3

=3/7

Hope this helps!

Thanks!

-Charlie

4 0
3 years ago
Other questions:
  • What is least common multiple of 28,12,14,21?
    10·1 answer
  • What is the circumference of a circle with an area of 25??
    14·1 answer
  • 3.95m + 8.95b = 47.65
    13·1 answer
  • Use the vocabulary term "absolute value" to explain the term opposite as it pertains to positive and negative numbers. Explain w
    9·1 answer
  • Circle the shape that is not equilateral.
    7·2 answers
  • Pls helppppppp!!!!!!!!!!!
    6·2 answers
  • Help!<br><br>Questions: fifteen litera of gasoline coast ₱725.what is the coast per litter​
    13·1 answer
  • Solve using the distributive property<br><br><br><br> 6(3x + 2)
    10·2 answers
  • A 15ft. ladder is leaning against the house. The top of the ladder touches the house at 9 feet above the ground. find the angle
    13·1 answer
  • Write the domain and range of the given figure.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!