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
salantis [7]
3 years ago
5

Please help with problem and show work

Mathematics
1 answer:
luda_lava [24]3 years ago
7 0

Answer:

x = 7

Step-by-step explanation:

The image below shows the relationship between secants chords and tangents.

Imagine that the letters in the image represent the numbers in the actually problem

E would equal 9

C would equal 12

and A would equal x

We would then use the same formula C² = E * ( E + A ) to solve for x , but once again instead of using letters we use the numbers in the problem

We would have 12² = 9( 9 + x )

we now solve for x

Step 1 simplify and distribute

12²=144

9 * 9 = 81

9 * x = 9x

we would then have 144 = 81 + 9x

step 2 subtract 81 from each side

144 - 81 = 63

81 - 81 cancels out

we now have 63 = 9x

step 3 divide each side by 9

63 / 9 = 7

9x / 9 = x

we're left with x = 7

You might be interested in
When fractions share the same number on the bottom they have a?
Snezhnost [94]
Fractions that have the same number on the bottom have a "common denominator."
6 0
3 years ago
Enter the inequality given by the graph below.
Rudiy27
The slope of the line is: m=(5-0)/(-3-2)=-1
y=-x+b
find out b by using a point: 0=-2+b, b=2
so the equation of the line is y=-x+2
it is dotted, so they should be an equal sign. 
the shaded part is to the right, above the line, so it is a >
the inequality is y>-x+2
4 0
3 years ago
Choose the best unit of measure to find the capacity of a swimming pool.
Marat540 [252]
Well actually depending on the size, if a small one I would use liters, but if a large ones like Olympics I would use kilolitres.
6 0
3 years ago
Read 2 more answers
Jordan has $55. She earns $67 by doing chores. How much money does jordan have now?
Nuetrik [128]
If Jordan has $55 and she earns $67 by doing chores, you can calculate how much money does Jordan have now using the following step:

$55 + $67 = $122

Result: Jordan has $122.
6 0
3 years ago
Read 2 more answers
If a 10 symbol sequence is sent through the channel,what is the probability that up to 3 symbols are in error out of the 10trans
lina2011 [118]

Answer: 0.171887

Step-by-step explanation:

Given that S0 and S1 are binary symbol of equal probabilty;

P(S0) = P(S1) = 0.5

This probability is a Binomial random variable of sequence Sn, where Sn counting the number of success in a repeated trials.

P(Sn =X) = nCx p^x (1-p)^(n-1)

Pr(at most 3) = P(0<= x <=3) = P(X=0) + 0) + P(X=1) + P(X=2) + P(X=3)

Since there are only 2 values that occur in sequence 0 and 1 ( or S0 and S1).Let the distribution be given by the sequence (0111111111),(1011111111),(11011111111),...(1111111110) for Sn= 1 is the sequence for 1 error.

10C0, 10C1, 10C2, and 10C3 is the number of sequences in value for X= 0, 1, 2, 3 having value 0 and others are 1. Let the success be p(S0)=0.5 and p(S1)= 0.5

P(0<= X <=3) = 10C0 × (0.5)^0 × (0.5)^10 + 10C1× (0.5)¹ × (0.5)^9 + 10C2 × (0.5)² × (0.5)^8 + 10C3(0.5)³(0.5)^7

= 1 × (0.5)^10 + 10 × (0.5)^10 + 45 × (0.5)^10 + 120 × (0.5)^10

=0.000977 + 0.00977 + 0.04395 + 0.11719

= 0.171887

3 0
3 years ago
Other questions:
  • Solve the equation -20=-4x-6x​
    8·1 answer
  • The given value below figure find the value of x
    12·1 answer
  • Ratios
    10·1 answer
  • X+71=7x+5 <br><br> Help help help
    5·2 answers
  • Evaluate -5 - 15 + 4 + 15
    5·2 answers
  • a cone and a cylinder have equal radii,r, and equal altitudes, h. If the slant height is l, then what is the ratio of the latera
    11·1 answer
  • The width of a rectangle is "w" inches long. If the length is 4
    10·1 answer
  • Enter the range of values for x:​
    14·2 answers
  • A bakery sells 4 lemon poppy muffins for every 5 bran muffins sold. Which table represents the relationship between lemon poppy
    14·1 answer
  • Complete the function table
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!