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
Ad libitum [116K]
3 years ago
11

Which of the following correctly completes the square for the equation

Mathematics
1 answer:
rjkz [21]3 years ago
7 0

Answer:

A. (x + 2)^2 = 31.

Step-by-step explanation:

x^2 + 4x = 27

x^2 + 4x - 27 = 0

A. (x + 2)^2 = 31

x^2 + 4x + 4 - 31 = 0

x^2 + 4x - 27 = 0

This option corresponds to the given equation, so it is correct.

B. (x + 2)^2 = 43

x^2 + 4x + 4 - 43 = 0

x^2 + 4x - 39 = 0

This does not correspond to the equation.

C. (x + 4)^2 = 31

x^2 + 8x + 16 - 31 = 0

x^2 + 8x - 15 = 0

This does not correspond to the equation.

D. (x+4)^2 = 43

x^2 + 8x + 16 - 43 = 0

x^2 + 8x - 27 = 0

This does not correspond to the equation.

So, your answer is A. (x + 2)^2 = 31.

Make sure to SUBMIT and check your PREVIOUS answers to make sure they are right! XD Also, hope this helps!

You might be interested in
7.
aivan3 [116]

Answer:

non-linear:  C, E, F

Step-by-step explanation:

Choices A, B, D are linear functions, so the rest are non-linear:  C, E, F

6 0
3 years ago
Answer please and explain
Fiesta28 [93]

Answer:

C=84

Step-by-step explanation:

Since you use 3 for pi. You plug the radius into the formula. C=2×3x14=84

5 0
3 years ago
Read 2 more answers
PLS HELP! (it will only let me do 31 points :() but you get brainliest.
MissTica

Answer:

107, there is two lines after that so 108 109 and the last line is 110 so your answer will be 107 degrees.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Please help i will give u a brainly
Alex777 [14]

Answer:

x=45degrees because there is 180 degrees on the straight lne and the first one is 90 degeeese and since it is split in half 90/2 is 45

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
1. The marked price of a Vacuum cleaner is $1,200.00. If it has a 25% discount, what is its selling price?
Norma-Jean [14]
I believe it is $960.
6 0
2 years ago
Other questions:
  • Glven these scores:
    6·1 answer
  • Pls help with this question. I forgot
    11·1 answer
  • Which expression is equivalent to 2x x2 3x 5x2 - 10x?
    15·1 answer
  • Isaac drove at an average speed of 49 mph over six hours. During the first three hours he drove at a speed that was 172 mph less
    8·1 answer
  • What is x in 2x + 5x​
    7·1 answer
  • Triangle A’B’C’ is a dilation of triangle ABC about point P with a scale factor of 1/2 . Is the dilation a reduction or an enlar
    15·2 answers
  • Help!I got stuck and don't know what to do.
    13·1 answer
  • Will mark branliest
    12·1 answer
  • Tossing a coin and spinning a spinner with five equal sections, 1-5
    10·2 answers
  • How many minutes does it take the duck to fly 1 kilometer?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!