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
Oksanka [162]
3 years ago
10

How do you solve an equation by completing the square? Example:

D-8" id="TexFormula1" title=" x^{2}+6x=-8" alt=" x^{2}+6x=-8" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
Serga [27]3 years ago
7 0
X²+6x+8=0
x²+2*3x+9-1=0
(x+3)²-1=0
(x+3)²-1²=0
(x+3-1)(x+3+1)=0
(x+2)(x+4)=0
x₁=-2
x₂=-4
Answer: x₁=-2,  x₂=-4
bixtya [17]3 years ago
7 0
x^2+6x=-8\\
x^2+6x+9=1\\
(x+3)^2=1\\
x+3=1 \vee x+3=-1\\
x=-2 \vee x=-4
You might be interested in
A.) 15<br> B.) 45<br> C.) 60<br> D.) 30
Minchanka [31]
The answer is the letter d the anwer is 30 I think it was just a guess and I'm bored dont throw no hate comment cuz I'm from Newark run my 30 just like the answer 30
6 0
3 years ago
Please help me with this<br> thanks<br> please let me know if my answer is incorrect
sergey [27]
I just graphed the table next to the graph of g and compared the two.

The y-intercept of f is (0,8) and the y-intercept of g is (0, -2).  So f is GREATER THAN the y-intercept of g.

Now to do the average rate of change, I see from the interval [-6,-3] that f is decreasing and for g it is increasing.  Thus f is LESS THAN the average rate of change of g.
5 0
3 years ago
n=400 people under the age of 25 was asked whether they check social media sites right after they wake up. 42% check social medi
Aliun [14]

Answer:

Step-by-step explanation:

We would set up the hypothesis test.

For the null hypothesis,

p = 0.5

For the alternative hypothesis,

p < 0.5

Considering the population proportion, probability of success, p = 0.5

q = probability of failure = 1 - p

q = 1 - 0.5 = 0.5

Considering the sample,

P = 42/100 = 0.42

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

n = 400

z = (0.42 - 0.5)/√(0.5 × 0.5)/400 = - 3.2

Recall, population proportion, p = 0.5

We want the area to the left of 0.5 since the alternative hypothesis is lesser than 0.5. Therefore, from the normal distribution table, the probability of getting a proportion < 0.5 is 0.00069

So p value = 0.00069

Since alpha, 0.05 > than the p value, 0.00069, then we would reject the null hypothesis.

Therefore, there is significant evidence to conclude that that less than 50% of people under the age of 25 check social media sites right after they wake up.

7 0
3 years ago
Express the missing divisor using a power of 10. Explain your reasoning using a place value model. 5.2 ÷ ___ = 0.052 *
Colt1911 [192]

Answer:

the answer is 100

Step-by-step explanation:

bc it is moved over 2 places to the left, plz can i be brainliest

3 0
2 years ago
Read 2 more answers
2. La forma correcta de representar la suma de -6 con-12 es:
nlexa [21]

Answer:

a) +-12-6

b) 70.5 * 18 = 1,269 + 120 = 1389 - 4 = 1385

c) 18

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • 542 increased by 1/4 of itself is?
    8·2 answers
  • X^2-5x-24=0 use the quadratic formula to find x
    8·1 answer
  • What point is the center of dilation?<br><br> point E’<br> Point H <br> Point O <br> Point G’
    8·2 answers
  • Which example would be likely to give a valid conclusion?
    10·2 answers
  • (100 POINTS):( You will be reported if you provide an inapplicable answer)
    7·1 answer
  • 3+×/2=10 <br> Is ×/2=7<br> And does ×=14
    6·1 answer
  • Solve the equation for Y<br> 2x + y = -9
    7·2 answers
  • Write an expression for “the difference of 10 and x.”
    6·1 answer
  • 3) INITII equation y=-x+ 4<br> equation<br> W10<br> slope (m) = _<br> y-intercept =
    7·1 answer
  • I only need the answer
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!