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
Deffense [45]
3 years ago
10

Someone please help

Mathematics
1 answer:
Artyom0805 [142]3 years ago
7 0

Answer:

x = -3.73 or -0.27

Step-by-step explanation:

From the question,

x²+ 4x+1 = 0

This is a quadratic equation, and it can be solved using any of the 3 methods.

Using completing the square method,

x²+4x = -1

Add half the coeffiecient of x, square it and add it to both side of the equation.

The coefficient of x is 4,

half the cofficient is 2

Add 2² to both side of the equation

x²+4x+2² = -1+2²

(x+2)² = 3

x+2 = ±√3

x+2 = ±1.73

Either,

x+2 = -1.73

x = -1.73-2

x = -3.73

or

x+2 = +1.73

x = =1.73-2

x = -0.27

You might be interested in
Help pls l need some help​
blagie [28]
The correct answer is C, 6/7
7 0
3 years ago
A square has a perimeter of 28
Kisachek [45]

Answer:

24

Step-by-step explanation:

To find the side length of a square, you have to divide the perimeter by 4 (since a square has 4 sides). 28 divided by 4 is 7 and 20 divided by 4 is 5. to find the area of each square, you have to multiply each side length by two. 7 times 7 is 49 and 5 times 5 is 25. 49 minus 25 is 24.

5 0
3 years ago
What is the standard deviation of the data set 21 ,6,18,21,20,14,19
VashaNatasha [74]
21 is the answer i think idk try dividing them all or finindng something or look up how to find a standard deviation 


8 0
3 years ago
What is the answer to -12= -2x-4x
Eddi Din [679]

Answer:

x = 2

Step-by-step explanation:

-12 = -2x - 4x

-12 = - 6x

x = -12/(-6) = 2

7 0
3 years ago
Read 2 more answers
Joey and his family are taking a road trip. On Monday they travel 68 miles. On Tuesday , they travel 25 miles. On Wednesday they
Stolb23 [73]

Answer:

42 miles

Step-by-step explanation:

so average is found by taking the sum of numbers of all the numbers given, and dividing by the number of numbers

so

68+25+33= 126

126/3=42

they drove an avg of 42 miles

hope this helps

6 0
3 years ago
Other questions:
  • 5.2 times a number is 46.8
    14·2 answers
  • Answer all those 4 question
    13·1 answer
  • Which equation represents a nonproportional relationship?
    7·1 answer
  • Find the quotient<br>- 72<br>-8​
    11·1 answer
  • Evaluate g(x)=-3x+5 when x=-2,0,3
    9·1 answer
  • Leona spent 5/8 of 2/3 of her allowance on magazines. What fractions of her total allowance did she spend on magazines? What fra
    10·1 answer
  • Write equation of the line containing (4,2) and (3,5)<br> in slope-intercept form.
    11·1 answer
  • A coach records the ages of the players on two of her teams. Which statement about the ages of the students is true? A The range
    7·2 answers
  • IF YOU ANSWER FIRST ILL GIVE BRAINLY
    6·2 answers
  • What is 4 2/3 × 6 7/10​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!