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
Maurinko [17]
2 years ago
7

Please help me! i need some to explain the equation for this.

Mathematics
2 answers:
topjm [15]2 years ago
6 0

Answer:

  (b)  21.4

Step-by-step explanation:

There are a couple of interesting relations regarding chords and secants and tangents of a circle. With the right point of view, they can be viewed as variations of the same relation, possibly making them easier to remember.

When chords cross inside a circle (as here), each divides the other into two parts. The product of the lengths of the two parts of one chord is the same as the product of the lengths of the two parts of the other chord.

Here, that means ...

  7x = 10·15

  x = 150/7 = 21 3/7 ≈ 21.4

_____

<em>Additional comment</em>

A secant is a line that intersects a circle in two places. (A tangent is a special case of secant where the two points of intersection are the same point.) When two secants meet outside the circle, there is a special relation between the lengths of the various line segments.

Consider the line segment from the point where the secants meet each other to the far intersection point with the circle. The product of that length and the length to the near intersection point with the circle is the same for both secants.

Here's the viewpoint that merges these two relations:

<em>The product of the lengths from the point of intersection of the lines with each other to the two points of intersection with the circle is the same for each line</em>.

(Note that when the "secant" is a tangent, that product is the square of the distance from the tangent point to the point of intersection with the other line--the distance to the circle multiplied by itself.)

antoniya [11.8K]2 years ago
6 0

According to the Question,

\rm7x = 10 \times 15

\rm x =  \frac{150}{7}

\bf x = 21.4

You might be interested in
What is the triangles' perimeter
DENIUS [597]
To find the perimeter of any shape, you find the sum of their side lengths.

In this case, this triangle has side lengths of 1.197, 0.764, and 1.74.
Add these, and the sum is your answer.

1.197 + 0.764 + 1.74 = 3.701

Therefore 3.701 is the correct answer :)
6 0
3 years ago
Read 2 more answers
PLZ TELL ME IF THIS IS RIGHT!!! THX
emmasim [6.3K]

Answer:

correct

Step-by-step explanation:

x means up and down and it is at -3

y means side to side and it is at -7

5 0
3 years ago
Determine which of (a)-(d) form a solution to the given system for any choice of the free parameter. (HINT: All parameters of a
Alecsey [184]

Answer:

Please see attachment

8 0
3 years ago
Read 2 more answers
what is the molariry of a solution that contains 1.22 mol of hydrogen chloride if the total volume of the solution is 1,251 mL?
hichkok12 [17]

Your molarity would be 0.975 M HCl because it’s moles of solute divided by liters of solvent

7 0
3 years ago
Read 2 more answers
The length of a piece of ribbon is 250 millimeters.<br> Which is the equivalent length in meters?
drek231 [11]

Answer:

250 mm = 0.25 m

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • A hummingbird’s heart beats about 1,250 beats
    7·1 answer
  • What is the other polynomial send help please
    13·1 answer
  • At a carnival, for every 19 games there are 10 rides. What is the ratio of games to rides?
    13·2 answers
  • Which of the following is equivalent to<br> ?<br> 36 37
    8·1 answer
  • I WILL GIVE 5 STARS SAY THANKS AND MARK BRAINLIEST FOR RIght While training for a marathon, Jan lost 4.2% of her mass. If she lo
    9·1 answer
  • !!!! HELP!!! BRAINLIEST !!!!What is the value of x?<br> Enter your answer in the box.<br> X=
    13·2 answers
  • Find the value of x.
    8·1 answer
  • Sarah took the advertising department from her company on a round trip to meet with a potential client. Including Sarah a total
    6·1 answer
  • a cylindrical-shaped water storage tank with diameter 60 ft and height 20 ft needs to be painted on the outside. if the tank is
    10·1 answer
  • Is -93/6 equivalent to -93/6?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!