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
SashulF [63]
3 years ago
8

Solve by completing the square ( need it asap pls) x2+18x+81=-4 -don’t send link-

Mathematics
1 answer:
Sholpan [36]3 years ago
6 0

Answer:

x=2.17

Step-by-step explanation:

x^2 +18x+81=-4

            -81  -81

x^2 +18x= -85

    /18       /18

x^2= -4.7

\sqrt{x^2}= \sqrt{-4.7}

x= 2.17

I hope this helps :) (if it does, brainliest, please??)

You might be interested in
You are going to mix a gallon bucket of window cleaner. The instructions direct you to mix 1 part cleaner to 3 parts water. How
Ira Lisetskai [31]
3 parts water
clean:water=1:3
1:3=xcleaner:1gallon
1/3=xcleaner/1gallon
times 3gallon both sides
1gallon=3xcleaner
divide both sides by 3
1/3 gallon=xcleaner

therfor you need 1/3 gallon of cleaner
7 0
2 years ago
A rival chocolate company is larger. They have 11 times as many workers.
scoundrel [369]

Answer:

13.4

Step-by-step explanation:

4 0
3 years ago
Based on the graph, what is the dependent variable, the equation relating the two variables, and how far will the dragonfly trav
ivann1987 [24]

Answer:

<h2>The dependent variable is distance, the equation is y = 20x, and the dragonfly will travel 480 miles.</h2>

Step-by-step explanation:

According to the graph, the dependent variable is Distance in miles, because it's on the vertical axis. Additionally, the independent variable is time in hours, because it's on the horizontal axis. However, you always put time as independent, because nothing affects time.

To find the equation, we just need to find the slope, using two points (0,0) and (2,40).

m=\frac{y_{2} -y_{1} }{x_{2} -x_{1} }=\frac{40-0}{2-0}=20

Therefore, the equation is y=20x, which shows a direct proportion between variables.

Now, in 24 hours, it would travel

y=20(24)=480

It would travel 480 miles.

Therefore, the right answer is the second choice.

8 0
2 years ago
Read 2 more answers
A board is 29ft long. The second piece is 4 times longer than the first. The third piece is 3 times longer than the second. What
Nady [450]

Answer:

Length of first piece = 1.7058823 ft

Length of second piece = 4(1.7058823) = 6.82352941 ft

Length of third piece = 12(1.7058823) = 20.47058823 ft

Step-by-step explanation:

As given, Total length of the board = 29 ft

Let the board is divided into 3 pieces

Suppose that the length of first piece = x ft

As given, the second piece is 4 times longer than the first

⇒Length of second piece = 4x ft

Also given, the third piece is 3 times longer than the second.

⇒Length of third piece = 3(4x) = 12x ft

Now,

As total length of board = 29

⇒ x + 4x + 12x = 29

⇒ 17x = 29

⇒ x = \frac{29}{17} = 1.7058823 ft

∴ we get

Length of first piece = 1.7058823 ft

Length of second piece = 4(1.7058823) = 6.82352941 ft

Length of third piece = 12(1.7058823) = 20.47058823 ft

5 0
3 years ago
What are some expressions equivalent to 12x + 4?
Vanyuwa [196]
12x + 4

divide 4 from each monomial

12x/4 = 3x
4/4 = 1

4(3x + 1) is a equivalent expression.


hope this helps
5 0
2 years ago
Read 2 more answers
Other questions:
  • Find BC, please i need help!!
    12·1 answer
  • The scale of a map is 1 cm: 77 km.
    12·1 answer
  • A tourist information center charges $10 per hour to rent a bycicle is this rental charge proportional to the number of hours yo
    9·2 answers
  • Find the slope of the line containing the pair points (9,5) (6,4)
    10·1 answer
  • How many regular triangles in a square
    9·1 answer
  • Lisa has a basket of 17 tomatoes.She makes sauce with 9 tomatoes.If Lisa wants to split up the rest between 3 friends and hersel
    9·2 answers
  • Please help me with this problem I need your help badly
    11·1 answer
  • mia hired a moving company, it charged 500$ for service mia give them a 16% tip.How much did she tip the movers.
    10·2 answers
  • Please help!! thanks.
    12·2 answers
  • What is the point-slope form of the line with slope 2/5 that passes through the point (-4, -7) ?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!