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
DaniilM [7]
3 years ago
6

13. SOLVE FOR X 21) 18 21 x+ 13 A) 8 C) 7 28 B) 11 D) 6

Mathematics
1 answer:
timurjin [86]3 years ago
4 0

Well first go to 'Add Attachments' when your asking a question.

Click whatever file/photo that you wanna show us, and click done.

See?

Ta da~

You might be interested in
What is the value of x in this equation? Enter your answer in the box.
katrin [286]

Answer:

6

Step-by-step explanation:

(2.4×10³)×(3×10^x)=7.2×10^9

(3x10^x)=(7.2×10^9)/(2.4×10^3)

3×10^x=3×10^6

10^x=10^6

*when bases are same ,powers are equated*

thus x=6

4 0
2 years ago
The circumference of ruby's old swimming pool is 47.1 feet. Her new swimming pool has a diameter of 21 feet. How much larger is
Alla [95]

The new pool is 18.84 feet larger in circumference than the old one.

<u>Explanation:</u>

Given:

Circumference of the pool = 47.1 feet

Diameter of the new pool, d = 21 feet

radius, r = 21/2 feet

Circumference of the new pool = ?

We know:

Circumference = 2πr

where,

r is the radius

On substituting the value:

C = 2 X 3.14 X \frac{21}{2}

C = 65.94 feet

The difference in circumference of the two pools = 65.94 - 47.1 feet

                                                                                  = 18.84 feet

Therefore, the new pool is 18.84 feet larger in circumference than the old one.

6 0
3 years ago
Which statement are true based on the diagram? Select 2 options
Step2247 [10]

Answer:

second and last are true

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Identify the type of hypothesis test below. H0:X=10.2, Ha:X&gt;10.2 Select the correct answer below: The hypothesis test is two-
Ganezh [65]

Answer:

The hypothesis test is right-tailed

Step-by-step explanation:

To identify a one tailed test, the claim in the case study tests for the either of the two options of greater or less than the mean value in the null hypothesis.

While for a two tailed test, the claim always test for both options: greater and less than the mean value.

Thus given this: H0:X=10.2, Ha:X>10.2, there is only the option of > in the alternative claim thus it is a one tailed hypothesis test and right tailed.

A test with the greater than option is right tailed while that with the less than option is left tailed.

4 0
3 years ago
The sum of the first n terms of an arithmetic sequence is n/2(4n + 20).
lesantik [10]

Answer:

(a).

S_{n} =  \frac{n}{2} (4n + 20) \\  \\S _{n - 1} =  \frac{(n - 1)}{2} (4n - 4 + 20) \\  \\ S _{n - 1} =  \frac{(n - 1)}{2} (4n + 16) \\  \\S _{n - 1} = \frac{(n - 1)(4n + 16)}{2}  \\   \\  { \boxed{S _{n - 1} =  {2 {n}^{2} + 6n - 8}}} \\

(b).

from general equation:

S _{n - 1} =  \frac{(n - 1)}{2} (4n + 16)

first term is 4n

common difference:

16 =  \{(n - 1) - 1 \}d \\ 16 = (n - 2)d \\ d =  \frac{16}{n - 2}

8 0
3 years ago
Other questions:
  • What is the length of leg s of the square shown !! Thank u
    9·1 answer
  • On average, Bethany has noticed that 22 trains pass by her house daily (24 hours) on the nearby train tracks. What is the probab
    9·1 answer
  • What is the value of x in the equation 2(6x+4)-6+ 2x = 3(4x+3)+1 ?<br> 1
    12·2 answers
  • tom uses water from a full tank to fill 6 bottles that each hold 16 ounces and a pitcher that holds 1\2 gallon. how many ounces
    11·1 answer
  • Solve for w: -5(3-w)+4=-5/6(24-6w)
    15·1 answer
  • 3
    14·1 answer
  • What is the type of angle pair?
    6·1 answer
  • 3. A line contains the points P (1,1) and Q (7,10) what is the slop of the line
    10·1 answer
  • If £1 is equal to 99.72 rupees and the post office only has 500 rupee papers how much can I change out of £450
    12·1 answer
  • 100 points + first decent answer gets brainliest
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!