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
spayn [35]
3 years ago
12

Solve (x + 1)2 – 4(x + 1) + 2 = 0 using substitution. u = x 4(x +1) x +1 (x + 1)2

Mathematics
1 answer:
marta [7]3 years ago
4 0

no substituion only rea numbersStep-by-stion:

You might be interested in
Pencils cost 0.55 each. A pack of pencils cost $11. Which equation can be used to fined p the number of pencils in one pack
Lerok [7]

(0.55 \times p) = 11
p = (11 \div 0.55)
8 0
3 years ago
In a recent study of 42 eighth graders, the mean number of hours per week that they watched television was 19.6. Assume the popu
olya-2409 [2.1K]

Answer:

19.6-2.42\frac{5.8}{\sqrt{42}}=17.43    

19.6+2.42\frac{5.8}{\sqrt{42}}=21.77    

And the best option for this case would be:

a. (17.5, 21.7)

Step-by-step explanation:

Information given

\bar X= 19.6 represent the sample mean

\mu population mean

\sigma= 5.8 represent the population deviation

n=42 represent the sample size  

Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

The degrees of freedom, given by:

df=n-1=42-1=41

Since the Confidence is 0.98 or 98%, the significance would be \alpha=0.02 and \alpha/2 =0.1, and the critical value would be t_{\alpha/2}=2.42

Replacing we got:

19.6-2.42\frac{5.8}{\sqrt{42}}=17.43    

19.6+2.42\frac{5.8}{\sqrt{42}}=21.77    

And the best option for this case would be:

a. (17.5, 21.7)

8 0
3 years ago
Write an equation in point-slope form for the line through the given point that has the given slope.
valkas [14]

Answer:

y=mx+b is the formula. So -8=-3x+5 would be the answer..

since (x,y) just substitute these numbers you have it into the formulas... Take y from (5,-8) and place it into y=mx+b. Next take the slope which is -3. And then since its a postive number we <em>add</em> are x from (x,y). -8=-3x+5. We also add x next to the slope (-3) becuase we are trying to solve for x. And we <em>always</em> put it next to the slope. Hope this helps!

6 0
3 years ago
Read 2 more answers
The double number line shows that 1 game of bowling 14 dollars what table represents the cost per game of bowling?
nikitadnepr [17]

Answer:

The second one is correct!

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Kendra paid $7 for her admission ticket to the fair and bought 12 ride tickets. She spent a total of $31 on admission and ride t
Bogdan [553]
X= one ride ticket 
12x+7=31
      -7    -7
     12x  =  12x
      ---        ---
      12       12
x=2 
$2
5 0
3 years ago
Other questions:
  • What is the midpoint of the segment shown below? (-2, 3) (10, 3)
    10·1 answer
  • If a central angle measures 25, then the measure of its intercepted arc is
    8·1 answer
  • Describe fully the single transformation that takes shape A to shape B.
    7·1 answer
  • What are the coordinates of the centroid of a triangle with vertices J(−4, 2) , K(2, 4) , and L(0, −2) ?
    14·2 answers
  • Myranda received a movie gift card for $100 to her local theater Matinee tickets cost $7.50 each and evening tickets 12.50 each
    9·1 answer
  • Which show the factored form of x^2-12x-45
    6·1 answer
  • Help quick! I'll mark your answer as the brainliest if your answer is correct!
    11·1 answer
  • Pls answer the photo question i need help
    8·1 answer
  • What is 500,000,000 +100,000,000:-500
    11·2 answers
  • Triangle IJK is similar to triangle LMN. Find the measure of side LM. Round your answer to the nearest tenth if necessary.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!