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
UNO [17]
4 years ago
12

PLEASE Help!! What is the solution of the equation? Eliminate any extraneous solutions.

Mathematics
1 answer:
BabaBlast [244]4 years ago
3 0
D. -4

sq rt of 3x+28-8=x
add 8 to both sides

sq rt of 3x+28 = x+8
square both sides of the equation

3x + 28 = x^2 + 16x + 64

subtract x^2+16x+64 from both sides
group common terms
-13x-36-x^2=0

rearrange and put in quadratic form

x= -13 +/- sq rt of 13^2-4(1)(36) over 2(1)

subtract 169 by 144

x= -12 +/- sq rt of 25 over 2

solve for both sides

x = -13+5 over 2
=-4

x= -13-5 over 2
= -9

now plug in x

sq rt of 3(-4)+28   -8=-4
sq rt of 3(-9)+28    -8= -9

-4 = -4
but
-7 does not = -9

so -4 is the solution
You might be interested in
What is the answer to <br> 20.6 + 19.4 ÷2
Butoxors [25]

Answer:

31.3

Step-by-step explanation:

Order of Operations, Division goes first, then Addition.

19.4/2 = 9.7

20.6 + 9.7 = 31.3

8 0
3 years ago
Read 2 more answers
PLEASE HURRY ILL DO ANYTHING
Kazeer [188]

First, we need to find out how many siblings the students have in total and how many siblings the teachers have in total.

The students: (1 x 4) = 4 + (2 x 7) = 18 + (3 x 5) = 33 + (4 x 2) = 41. The students have a total of 41 siblings.

The teachers: (1 x 3) = 3 + (2 x 2) = 7 + (3 x 4) = 19 + (4 x 5) = 39 + (5 x 3) = 54 + (6 x 1) = 60 + (8 x 1) = 68. The teachers have a total of 68 siblings.

Now that we have this information, we know that the answer is option 1, the students tend to have fewer siblings than the teachers. This is because the students had a total of 41 siblings and the teachers had a total of 68 siblings, and 41 is less than 68 so the students have fewer siblings than the teachers.

I really hope I could help! I put a lot of work into this answer! :D

5 0
3 years ago
Which of the following is a rotation? Select all.
MakcuM [25]

Answer:

A B C D

Step-by-step explanation:

Hey you said to select all

A and D

5 0
3 years ago
Read 2 more answers
A market research firms conducts studies regarding the success of new products. The company is not always perfect in predicting
Taya2010 [7]

Answer: Our required probability is 0.7273.

Step-by-step explanation:

Since we have given that

                                Actually successful   Actually failure   Total

Predicted successful                0.4                  0.15            0.55

Predicted failure                        0.1                  0.35             0.45

Total                                           0.5                  0.50                 1

Probability that the market research firm would predict that it would be success.

P(Actual success|Predicted success) is given by

\dfrac{0.4}{0.55}=0.7273

Hence, our required probability is 0.7273.

5 0
3 years ago
A car sales person is . a base salary of 35,000 a year +8% of sales what are the sales needed to have an annual income greater t
LenKa [72]
So I assume that 8% is for every sale and meaning he would have to sell 11 sales to get 88% and then that multiplied by 35000 gets you to 30800 and add that by 35000 will get you to 65800 which is more than 65000
5 0
4 years ago
Other questions:
  • Problem 2 Previous Problem Problem List Next Problem (1 point) Determine ifv is an eigenvector of the matrix A No 1 5 0 0 7 0 -2
    6·1 answer
  • What is 1/5 x 15 please answer
    10·2 answers
  • PLEASE HELP ASAP ANSWER 3 QUESTIONS !!!!! I WILL GIVE EXTRA 20 POINTS FOR THE CORRECT ANSWER AND THE CORRECT EXPLANATION.
    13·1 answer
  • Line segment AB has endpoints at A (-4,4) and (8,8). Find and plot its image after a dilation with a center at the origin and a
    6·1 answer
  • Bill buys the pizza shown below.
    5·2 answers
  • What is the volume of the square pyramid shown below with sides that are 12.5 m long and a height of 16 m
    13·1 answer
  • How to graph Y &gt; x- 4
    12·1 answer
  • O.5 is &lt; or &gt; or = to 0.7
    7·2 answers
  • A line's slope is 3, and it's y-intercept is 2. What is its equation in slope-intercept form?
    5·1 answer
  • One bag contains a mixture of 30% black sand and 70% red sand. A second bag
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!