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
Serhud [2]
3 years ago
14

Solve x2+6x=7 by completing the square.Which is the solution set of the equation?

Mathematics
1 answer:
NARA [144]3 years ago
4 0

Answer:

x = - 7, x = 1

Step-by-step explanation:

Given

x² + 6x = 7

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(3)x + 9 = 7 + 9

(x + 3)² = 16 ( take the square root of both sides )

x + 3 = ± \sqrt{16} = ± 4 ( subtract 3 from both sides )

x = - 3 ± 4

x = - 3 - 4 = - 7

x = - 3 + 4 = 1

Solution set = { - 7, 1 }

You might be interested in
Need help ASAP please
yuradex [85]
It would definatly be 13 because thats logical
5 0
3 years ago
The mean age of 3 women in an office is 30 years old.
Hoochie [10]

Answer:

32 years

Step-by-step explanation:

Here, we simply calculate the age of all first

For all men, we have 7(33) = 231

For all women = 3(30) = 90

So we simply have;

(90 + 231)/10 = 32.1

Approximately 32 years

4 0
2 years ago
How do i do this problem?
morpeh [17]
2 1/3 + 1 3/4 = 3 10/12 

5/6 = 10/12

3 10/12 + 10/12 = 3 20/12 = 4 8/12 = 4 hours 40 minutes

4 hours 5 minutes away from 10:05 would be 6 pm

subtract 35 from that and you get 5:25 pm
3 0
3 years ago
A flooring company needs to tile a section of a kitchen that is in the shape of a triangle.
Usimov [2.4K]

Answer: It is possible to determine the height of the triangle by using the formula of the area of a triangle and creating an equation to find the missing value (height). Also, the value of the height is 7ft

Explanation:

The area of a triangle is found by using both the height and the base of a triangle. Indeed, the general formula for this is A( area) = h (height) x b (base) ÷ 2. Now, this general formula can be used to find any of the values missing if two values are known. This means the height can be calculated using the area and the base. To do this, create a simple equation and solve it. The process is shown below:

1. Write the general equation

A = \frac{h  b}{2}

2. Replace the letters with the values you have

21 =\frac{6b}{2}

3. Find the missing value by moving the values to the other side of the equal symbol (=) and changing its symbol

21 x 2 = 6b   -For example 2 divided 6b but if it is changed to the other side it needs to multiply

42 = 6 b

42 / 6 = b

b = 7

This means the value of the height is 7 ft. If  you want to double-check this, use the original formula:

A = 6 ft x 7 ft / 2

A= 42 ft^{2} / 2

A= 21 ft^{2}

6 0
2 years ago
full-time job usually means you will work how many hours per week? A. 20 B. 35 C. 40 D. 55 Please select the best answer from th
kirill115 [55]

Answer:

C. 40 or B. 35

Step-by-step explanation:

Full time jobs are typically jobs that vary from 35-40 hours a week.

Hope this helps :)

8 0
3 years ago
Read 2 more answers
Other questions:
  • Using the substitution method to solve the system. 5x+2y=5 x=3y-16
    11·2 answers
  • the amount of money roderick takes home each month is his roderick works as an architectural draftsman for an engineering firm.
    8·2 answers
  • MARKING BRAINLEST!!! ALSO 5 STAR
    10·1 answer
  • Sue solved an equation incorrectly, as shown below:
    5·1 answer
  • Solve the equation for y. Then find the value of y for each value of x.
    10·1 answer
  • Plsss help meeeeeeeeeeeee
    11·1 answer
  • X/5-8 =-3 can you help<br> W
    15·2 answers
  • Can any one help <br> A<br><br> B. <br><br> C
    9·1 answer
  • Need helppppppppppppppppp
    13·1 answer
  • Determine whether the sequence converges or diverges. if it converges, find the limit. (if an answer does not exist, enter dne.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!