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
Tamiku [17]
3 years ago
5

Solve for x. Use the completing the squares method. Round decimals to the nearest tenth. 2x2+16x=−18 (

Mathematics
1 answer:
Aneli [31]3 years ago
7 0
To solve by completing square method we proceed as follows:
2x^2+16x=-18
dividing through by 2 we get:
x^2+8x=-9
but
c=(-b/2a)^2
c=(-8/2)=16
hence
x^2+8x+16=-9+16
x^2+8x+16=7
(x+4)(x+4)=7
(x+4)^2=7
thus getting the square root of both sides
x+4=+/-√7
x=-4+/-√7
x=

You might be interested in
a van is carrying 486 pounds there are 27 boxes in the van what is the average weight of each box in the van
Kruka [31]

The average weight per box is the total weight divided by the number of boxes.

... (486 pounds)/(27 boxes) = 18 pounds/box


The average weight of each box is 18 pounds,

3 0
3 years ago
Read 2 more answers
-5/6x = 20 2/3(x - 7) = -2 solve them and show your work! ASAP! I need this done fast!!
LenKa [72]

Answer:

x=-24 & x=4.

Step-by-step explanation:

-5/6x=20

x=20/(-5/6)

x=(20/1)(-6/5)=-120/5=-24

-------------------------------------

2/3(x-7)=-2

2/3x-14/3=-2

2/3x=-2+14/3

2/3x=-6/3+14/3

2/3x=8/3

x=(8/3)/(2/3)

x=(8/3)(3/2)=8/2=4

3 0
3 years ago
Please help ASAP. 40 pts
Allisa [31]

Answer:

19 < x < 31

Step-by-step explanation:

The range for the third side is

25-6 < x < 25+6

19 < x < 31

Take the other two sides and subtract and take the other two sides and add

7 0
3 years ago
Read 2 more answers
1. Which of the following is not a property of mathematical proofs?
aleksley [76]


Which is not a property of mathematical proofs?

Conclusion has nothing to do with math

it is for writeing.

4 0
3 years ago
Read 2 more answers
Find all real zeros of the function Y = -9x - 1.
Iteru [2.4K]
The answer is d. 9.-1
5 0
3 years ago
Read 2 more answers
Other questions:
  • Billy graphed the system of linear equations to find an approximate solution.
    11·2 answers
  • The number pi goes on forever with no repeating pattern; therefore, it is rational. A) True or B) False
    11·1 answer
  • the coach of a local basketball team says that her team scored 40 points in the first game and 60 points in the second game. wha
    8·2 answers
  • How many total pieces of colored paper are in the package use the rate your wrote in Part A
    11·1 answer
  • You earn 30,000 per year and federal tax is 10 percent what is your gross income?
    8·1 answer
  • The U.S. Fish and Wildlife Service reported that the mean length of six-year-old rainbow trout in the Arolik River in Alaska is
    11·1 answer
  • Merry Christmas have a great day and god bless you I will give Brainlyisy to the first person to see this the point are at 100 b
    7·1 answer
  • HEEELLLPPPP PLLLZZZ TT^TT
    11·2 answers
  • Một ông 43 tuổi đến khám tổng quát. Phân tích nước tiểu thấy có đường niệu. Bạn vừa biết có một test T dung phát hiện bệnh tiểu
    5·1 answer
  • What is the solution set of the following system of<br> equations?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!