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
jonny [76]
2 years ago
13

FIND the value of x. DO NOT POST ANY FILES

Mathematics
1 answer:
spayn [35]2 years ago
7 0

Answer:

Step-by-step explanation:

The tangent segment is perpendicular to the diameter, so the triangle is a right triangle (not just based on its appearance).  A property of circles is:  a tangent is perpendicular to the radius drawn to the point of tangency.

In the right triangle, one leg has length 12.6, and the hypotenuse has length 21.

Apply the Pythagorean Theorem:  (leg)^2 + (leg)^2 = (hypotenuse)^2

Oh, and the diameter has length 2x!

(2x)^2+12.6^2=21^2\\\\4x^2+158.76=441\\\\4x^2=282.24\\\\x^2=70.56\\\\x=\sqrt{70.56}\\\\x=8.4

You might be interested in
Please help!
lisabon 2012 [21]

The leftmost line segment has a domain of -4 ≤ x < -1, or [-4, 1).

The central line segment has a domain of -1 ≤ x ≤ 2, or [-1, 2].

The rightmost line segment has a domain of 2 < x ≤ 5, or (2, 5].

Overall, this function has a domain of

[-4, 1) U [-1, 2] U (2, 5]

(where U means "union" in the set-theoretic notion)

But this also simplifies to the interval [-4, 5].

These correspond to the <u>first</u> and <u>last</u> choices.

8 0
2 years ago
Can someone please help me
Effectus [21]

Answer:

140 degrees

Step-by-step explanation:

A straight line is 180 degrees and since we are given 40 degrees of that acute angle, we know that whatever the missing angle degree is, it cant be over 180 degrees or less than 40 degrees. So we take our full measure 180 and subtract 40 because that's what is given.

8 0
2 years ago
Multiply (−4) × (−2) × (−5).
pashok25 [27]

-40

(-4)*(-2)=8

8*(-5)=40


Hope this helped :)

5 0
3 years ago
Read 2 more answers
The three linear equations have y intercept of -3.8 and 7 respectively. Yet, a function can have only one y intercept. which of
k0ka [10]

Answer:

agagasg

Step-by-step explanation:

5 0
3 years ago
6. Using the discriminant, determine the value of k that will give 1 solution (i.e. discriminant equals zero) y = kx²-4x + 4 ​
Gwar [14]

Answer:

k = 1

Step-by-step explanation:

<u>Discriminant</u>

b^2-4ac\quad\textsf{when }\:ax^2+bx+c=0

\textsf{when }\:b^2-4ac > 0 \implies \textsf{two real roots}

\textsf{when }\:b^2-4ac=0 \implies \textsf{one real root}

\textsf{when }\:b^2-4ac < 0 \implies \textsf{no real roots}

As we need to determine the value of k that will give <u>one solution</u>, set the <u>discriminant to zero</u>.

<u>Given equation</u>:

y=kx^2-4x+4

Therefore:

  • a = k
  • b = -4
  • c = 4

Substitute these values into the discriminant and solve for k:

\begin{aligned}b^2-4ac & = 0\\\implies (-4)^2-4(k)(4) & = 0\\16-16k & = 0\\16k & = 16\\\implies k & = 1\end{aligned}

4 0
1 year ago
Other questions:
  • Shamariah collects silk roses. She had 17 silk roses in a vase. Six friends each gave her 3 more roses. How many roses does sham
    14·1 answer
  • Convert 19(pi)/4 to degrees
    8·1 answer
  • The school cafeteria is baking cookies for lunch. each student gets 3 cookies with their lunch. if there are 231 children buying
    6·1 answer
  • Find the area of the triangle SHOW WORK
    15·1 answer
  • The struggle is real
    12·1 answer
  • Which ordered pair could be removed so that the set of ordered pair is a function
    15·2 answers
  • In a survey, 85% of those who responded to a survey were over 40 and voted in this last election. If the population of a town wa
    15·1 answer
  • ❌Will mark brainliest answer
    12·1 answer
  • The table shows elevations at various locations.
    10·2 answers
  • In need of help. plz ​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!