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
Lina20 [59]
3 years ago
9

❗️10 points❗️ A. x^2 + 10x + 25 B. x^2 + 8x + 25 C. 10x + 25 D. -2x^2 + 10x + 25

Mathematics
1 answer:
Serggg [28]3 years ago
7 0

Answer:

10x+25

Step-by-step explanation:

The area of the large square is

A= s^2 where s is the side length

A =(x+5)^2

FOIL

  x^2 +10x +25

The small square has an area of

A =(x)^2

The difference is

A large minus A small

x^2 +10x +25 - x^2

10x+25

You might be interested in
Find the diameter of a dinner plate whose circumference is about 19 inches
vodka [1.7K]
The answer is 4.6
                               the equation is 19 * 4.13
8 0
3 years ago
Please help!! Just with 13 please. please try explain it and show work if possible, I really dont understand ​
Mashcka [7]

Answer:

0.0987

Step-by-step explanation:

8 0
3 years ago
Students are planning the backdrop for the school play. The backdrop is 15 feet wide and 10 feet high. Every 16 inches on the sc
alekssr [168]

Answer:6

Step-by-step explanation:

6 0
3 years ago
Simplify the expression
Naily [24]

Answer:

6

Step-by-step explanation:

3 sqrt(20) / sqrt(5)

We know that sqrt(a) /sqrt(b) = sqrt(a/b)

3 sqrt(20/5)

3 sqrt(4)

3 *2

6

4 0
3 years ago
Read 2 more answers
A student records the number of hours that they have studied each of the last 23 days. They compute a sample mean of 2.3 hours a
natita [175]

Answer:

the standard deviation increases

Step-by-step explanation:

Let x₁ , x₂, .   .   .  , x₂₃ be the actual data observed by the student

The sample means  = x₁  +  x₂  +  .   .   .  , x₂₃ / 23

= \frac{x_1 +x_2 +...x_2_3}{23}

= 2.3hr

⇒\sum xi =2.3 \times 23 = 52.9hrs

let x₁ , x₂, .   .   .  , x₂₃  arranged in ascending order

Then x₂₃ was 10  and has been changed to 14

i.e x₂₃ increase to 4

Sample mean  = \frac{x_1 +x_2 +...x_2_3}{23}

\frac{52.9hrs + 4}{23} \\\\= \frac{56.9}{23} \\\\= 2.47

therefore, the new sample mean is 2.47

2) For the old data set

the median is x_1_2(th) values

[\frac{n +1}{2} ]^t^h value

when we use the new data set only x₂₃ is changed to 14

i.e the rest all observation remain unchanged

Hence, sample median = [{x_1_2]^t^h value remain unchange

sample median = 2.5hrs

The Standard deviation of old data set is calculated

=\sqrt{\frac{1}{n-1} \sum (xi - \bar x_{old})^2 } \\\\=\sqrt{\frac{1}{22}\sum ( xi - 2.3)^2 }---(1)

The new sample standard sample deviation is calculated as

= \sqrt{\frac{1}{n-1} \sum (xi-2.47)^2} ---(2)

Now, when we compare (1) and (2)  the square distance between each observation xi and old mean is less than the squared distance between each observation xi and the new mean.

Since,

(xi - 2.3)²  ∑ (xi - 2.47)²

Therefore , the standard deviation increases

6 0
3 years ago
Other questions:
  • Solve for n or d27/36=n/4
    14·1 answer
  • In 1971 the us dollar became part of the total fiat system meaning what?
    12·1 answer
  • Jessica traveled to Portland by car. Going there took 3 hours, and the return trip lasted 6 hours. Jessica averaged a speed of 4
    13·1 answer
  • Yancey collects plastic banks .He has three different banks: a pig, a cow, and a horse. How many ways can Yancey arrange his ban
    12·2 answers
  • I need help with this
    13·2 answers
  • In ΔKLM, the measure of ∠M=90°, the measure of ∠K=78°, and KL = 35 feet. Find the length of MK to the nearest tenth of a foot.
    8·2 answers
  • Please answer asap I need help
    7·1 answer
  • Htdtdeyt5ey5jed6yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuurrrrrrrrrrrrrrrrrrrrrrrrrr
    10·1 answer
  • Plot the points (-8,7) and (5,7) on the coordinate plane below. What is the distance between these two points?
    10·1 answer
  • Which equation represents this sentence?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!