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
rosijanka [135]
3 years ago
9

Please answer and help me on this question!​

Mathematics
1 answer:
Nady [450]3 years ago
4 0
<h3>Answer: 10.1 cm approximately</h3>

=====================================================

Explanation:

The double tickmarks show that segments DE and EB are the same length.

The diagram shows that DB = 16 cm long

We'll use these facts to find DE

DE+EB = DB

DE+DE = DB

2*DE = DB

DE = DB/2

DE = 16/2

DE = 8

-------------

Now let's focus on triangle DEC. We just found the horizontal leg is 8 units long. The vertical leg is EC which is unknown for now. We'll call it x. The hypotenuse is CD = 9

Use the pythagorean theorem to find x

a^2+b^2 = c^2

8^2+x^2 = 9^2

64+x^2 = 81

x^2 = 81 - 64

x^2 = 17

x = sqrt(17)

That makes EC to be exactly sqrt(17) units long.

If you follow those same steps for triangle ADE, then you'll find the missing length is AE = 6

---------------

So,

AC = AE+EC

AC = 6 + sqrt(17)

AC = 10.1231056256177

AC = 10.1 cm approximately

You might be interested in
Find the sum of the first 8 terms of the series. 1/2 + 1 + 2 + 4
Roman55 [17]

\bf \cfrac{1}{2}~~,~~\stackrel{2\cdot \frac{1}{2}}{1}~~,~~\stackrel{2\cdot 1}{2}~~,~~\stackrel{2\cdot 2}{4}~~,...

so as you can see the common ratio is 2, and the first term is 1/2,

\bf \qquad \qquad \textit{sum of a finite geometric sequence} \\\\ S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad  \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ r=\textit{common ratio}\\ ----------\\ r=2\\ a_1=\frac{1}{2}\\ n=8 \end{cases} \\\\\\ S_8=\cfrac{1}{2}\left( \cfrac{1-2^8}{1-2} \right)\implies S_8=\cfrac{1}{2}\left( \cfrac{-255}{-1} \right)\implies S_8=\cfrac{255}{2}

4 0
3 years ago
Read 2 more answers
HELP ASAP FIRST CORRECT GETS BRAINLIEST
iren [92.7K]

Answer:

Right

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
I need to know the answer please help me
True [87]

Answer:

F: 12r+y

Step-by-step explanation:

- Why not G because if you multiple 2 by 6 and you get 12 then why not multiple the 6 too.

- Why not H because how do you get 16???

- Why not J because you don't add 2 pulse 6 to make 8 when you are supposes to multiple.

Hope this helps and sorry if wrong :)

8 0
3 years ago
I need help please.
12345 [234]

-3x^2 X=4

4^2= 4x4=

16

16(-3)= -48

5 0
3 years ago
Suppose Johnny invests $41,745 into an account, which has been earning interest for many years and he now has a total of $39,974
Dmitriy789 [7]

Answer:

A negative number would be reasonable in the solution of the rate of the investment. It would be reasonable because Johnny started out with $41,745 in his account and ended up with $39,974 which means that the rate has to be negative.


please rate and thank : )


7 0
3 years ago
Other questions:
  • The sum of three consecutive even numbers is 66. What is the smallest of these numbers?
    9·1 answer
  • My math problem is: X/8 + 6 = -8
    6·1 answer
  • Please help asap 45 pts
    11·1 answer
  • Mai has a bookcase with 6 shelves. There are c books on each shelf. Using c, write an expression for the total number of books.
    8·2 answers
  • Right triangles are similar. Always, sometimes, never
    10·1 answer
  • 10 ft
    6·1 answer
  • Eight candy bars cost $6.00. Caulatue the cost per candy bar​
    10·2 answers
  • Can someone please help me on this
    15·1 answer
  • Miguel earns extra money washing cars on the weekend. He washes 5 cars per hour and earns $14.50 per car.
    8·1 answer
  • Find the total number of sides (y)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!