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
Marrrta [24]
3 years ago
11

Homework help, one of the few I have

Mathematics
2 answers:
Alex73 [517]3 years ago
8 0

Answer:

x=4 and the solution is not extraneous

Step-by-step explanation:

\sqrt{2x+1}=3 \\\\2x+1=9 \\\\2x=8 \\\\x=4

This solution is not extraneous, because plugging it back in you get:

\sqrt{2(4)+1}=3 \\\\\sqrt{9}=3 \\\\3=3

Hope this helps!

Bogdan [553]3 years ago
7 0

Answer:

X = 4, solution is not extraneous

Step-by-step explanation:

3 = √9

so we get the following comparison;

2X + 1 = 9 (both minus 1)

2X = 8 (divide by 2)

X = 4

if we fill in 4 for X. we get

√2•4+ 1 = √9 = 3 so the solution is not extraneous

You might be interested in
Let f and g be functions given by f(x)=x^3 and g(x)=x^2 lxl
adell [148]
I post an image instead.
Correction: g(3)=(3²)|3|=9(3)=27

4 0
3 years ago
A department store sells t-shirts for $16.00. Every month that a t-shirt doesn’t sell, the store reduces the selling price by 25
algol13

Answer:

Step-by-step explanation:

A = 25% of 16 ==\frac{25}{100}*8=\frac{1}{4}*8=2

Selling price after reduction = 16 - 2 = $14

B= 25% of 14

=\frac{25}{100}*14=\frac{1}{4}*14=\frac{7}{2}

= 3.5

Selling price = 14 - 3.5 = $10.5

C = 25% of 10.5

=\frac{25}{100}*10.5=\frac{10.5}{4}

= 2.625 = $ 2.63

Selling price = 10.5 - 2.63 = $ 7.87

5 0
3 years ago
Read 2 more answers
Please help with the question,
castortr0y [4]
The correct answer is x^2-2x+2=0

 The explanation is shown below:

 1. To solve the problem shown in the figure above, you must apply the following proccedure:

 2. You have that the roots of the quadratic equation shown in the figure attached in the problem are:

  x=-1±i

 3.  Then, you know the quadratic formula to solve quadratic equations, which is:

 (-b±√(b^2-4ac))/2a

 4. You can see in the figure that a=1 and c=2; then, by analizing this, you can conclude that the coefficient b is:

 b=-2

 5. Therefore, you can conclude tha the quadratic equation is:

 x^2-2x+2=0

 6. If you want to verify it, apply the quadratic formula to the quadratic equation shown above and you will obtain the roots shown in the figure.
8 0
3 years ago
Read 2 more answers
which real life object is an example of a parabolic arc? a. objects being thrown straight into the air b. floating clouds c. the
allsm [11]

Answer:

A, E, F, G

Step-by-step explanation:

The picture below represents a parabolic arc.

An example can be an object being thrown up in the air then then coming back down.

8 0
3 years ago
PLEASE HELP, I’LL GIVE BRAINLIST!!
harkovskaia [24]

For a ratio make a fraction using the quantities of the colors.

You want the ratio of red to purple.

There are 16 red and 2 purple, so the ratio would be 16/2, which can be reduced to 8/1

7 0
3 years ago
Other questions:
  • 1. Mona sells previously enjoyed rare CDs for $5/ea. and rare vinyl records for $7/ea. She sold a total of 1,200 CDs and records
    15·1 answer
  • Which unit would you use to measure the time it would take to fly across the country?
    8·2 answers
  • Can someone help me plss!!?? ​
    13·2 answers
  • Can someone please help
    7·1 answer
  • A mirror with a reflecting surface that caves inward is said to be
    12·1 answer
  • MATH HELP! I'm trying to use dot products and vectors for my Pre-calc class..:
    6·2 answers
  • The radius of a circle is 4 in . Find it’s circumference in terms of
    5·1 answer
  • HELP PLEASE!!! I WILL FIVE STAR!!
    13·1 answer
  • I will give brainliest to correct answer
    11·1 answer
  • Students were asked how many hours during the
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!