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
Semenov [28]
3 years ago
8

How do you solve x^2 plus 16x plus 63=0?

Mathematics
1 answer:
Alex3 years ago
8 0
x^2+ 16x + 63=0 \\ \\a=1, \ b=16 , \ c=63 \\ \\ \Delta =b^2-4ac =16^2 -4\cdot1\cdot 63 = 256 -252 = 4 \\ \\x_{1}=\frac{-b-\Delta }{2a}=\frac{-16-\sqrt{4}}{2 }=\frac{-16-2}{2}=-\frac{-18}{2}=-9 \\ \\x_{2}=\frac{-b+\Delta }{2a}=\frac{-16+\sqrt{4}}{2 }=\frac{-16+2}{2}=-\frac{-14}{2}=-7 \\ \\ \\Answer : \ x= -7 \ \ or \ \ x= -9
You might be interested in
Ali and Tibor get paid $9 per hour. This week, Tibor made an additional $27 in overtime.
Leviafan [203]
9a + (9t+27)=x

To write it another way you could flip the numbers around:

(9t+27)+9a=x

Or flip the variable to the other side.

x=9a + (9t+27)

Any way you put the numbers as long as x is on the either side, you will get the same answer.

Hope this helps!
4 0
3 years ago
The triangles are similar, solve for x.<br> N+3<br> 8
Nonamiya [84]

Answer:

5

Step-by-step explanation:

3+5=8

4 0
2 years ago
Need help with this one. TY!!
xxMikexx [17]

Answer:

(a) 6x + (x + 12) = 180  

(b) m<1 = 144       m<2 = 36

Step-by-step explanation:

7x + 12 = 180

7x = 168

x = 24

6(24) = 144

(24) + 12 = 36

8 0
3 years ago
Read 2 more answers
Find an equation for the nth term of the sequence. <br><br> -4, -16, -64, -256, ...
Andrews [41]
This is a geometric sequence  with first term a1 = -4 and common ratio r = 4

so nth term  = a1* r^(n-1)

                   = -4 *4^(n-1)
5 0
3 years ago
Read 2 more answers
after working for 25 hours, Lamar made $375. After working 40 hours, Lamar made $600. Predict how much he would make after 10 ho
Tcecarenko [31]
375÷25=15
600÷40=15
so his pay is 15 dollars per hour.
now multiply 15×10=150
6 0
3 years ago
Read 2 more answers
Other questions:
  • I'm struggling with this one ​
    8·2 answers
  • If two pounds of peaches are 4.20 how much is five pounds
    6·2 answers
  • Is 74 fluid ounces greater than less than or equal to 8 cups
    14·2 answers
  • 45 + 5 = what i need so HELP
    6·2 answers
  • Which scenario is modeled in the diagram below? Percents Total 75% 25% 100% 25% 25% 25% 25% $55.15 $55.15 $55.15 $55.15 Kaia sav
    11·2 answers
  • I believe the answer is B can anyone confirm please?
    9·1 answer
  • Which step could be used to help isolate the variable in the following equation
    15·2 answers
  • How to cancel 10+5/12*9l​
    9·1 answer
  • PLZ HELP ME, I'M DOING A TEST I NEED HELP PLZ
    15·1 answer
  • Find the distance between the follwing points: (-4,11), (3,5)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!