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
dlinn [17]
1 year ago
9

I need help with math

Mathematics
1 answer:
nevsk [136]1 year ago
6 0

Answer:

Step-by-step explanation:

<h3>7) The lengths of the tangent from an external point to a circle are  equal.</h3>

      2x - 1 = x + 10

           2x = x + 10 + 1

           2x = x + 11

      2x -x  = 11

             \sf \boxed{\bf x = 11}

8) Radius : XC

    Chord: CB

   Diameter : AB

  Name of the circle: X    {a circle is named by its center}

You might be interested in
Pls answer if u know :) <br><br> This is a very important homework and i was gone for days so idk
aliya0001 [1]

Answer:

Option B

Step-by-step explanation:

Slope of the line is calculated by the formula:

m=\frac{y_2-y_1}{x_2-x_1}\\\\

We have the points ( -2 , 4) and (3 , -5) so plug in the values in the formula:

m=\frac{y_2-y_1}{x_2-x_1}\\\\m=\frac{-5-4}{3-(-2)}\\\\m=\frac{-9}{5}\\

so the slope(m) equals -9/5

6 0
3 years ago
I need help please with number 12 please I’m begging on my knees for help☹️
Taya2010 [7]

Answer: i did the math and i think it's the best bet bc i got 75 cents and the rest is highier


Step-by-step explanation:


3 0
3 years ago
Read 2 more answers
What happens to the Law of Cosines if the known angle is 90 degrees?
poizon [28]

Answer:

See below.

Step-by-step explanation:

It transforms  to the Pythagoras theorem.

c^2  = a^2 + b^2 - 2ab cos C

If C = 90,  cos C = zero so the last term disappears.

c^2  = a^2 + b^2 - 2ab * 0

c^2 = a^2 + b^2.

8 0
3 years ago
A researcher wants to estimate the mean commute time of residents in Westchester County. The researcher samples 40 commuters and
Ksenya-84 [330]

Answer:

21.759

Step-by-step explanation:

Given that :

Mean (m) = 25

Standard deviation (s) = 12.5

Sample size (n) = 40

α = 90%

The confidence interval is obtained using the relation:

Mean ± Zcritical * s/sqrt(n)

Zcritical at 90% confidence interval = 1.64

25 ± 1.64 * (12.5/sqrt(40))

Lower boundary : 25 - 1.64(1.9764235) = 21.75866546

Upper boundary : 25 + 1.64(1.9764235) = 28.24133454

(21.759, 28.241)

Hence, lower bound of confidence interval is : 21.759

4 0
2 years ago
If bill payed 73.80 for 32 4/5 gallons of gas, how much did he pay per gallon​
blsea [12.9K]

Answer:

$2.25

Step-by-step explanation:

73.80/32.8

3 0
3 years ago
Other questions:
  • During the early 20th century, in what way was the radio better than the phonograph in encouraging the concept of crosspollinati
    14·1 answer
  • Answer?<br> 2xy+4xy(1+8-7+32)21xy
    13·1 answer
  • Please help faaaaast!!!! First answer gets brainliest!!!!!!!
    6·1 answer
  • Iel travels 400 miles in 8 hours. What is her rate of change or speed? A) 40 miles per hour B) 50 miles per hour C) 55 miles per
    15·1 answer
  • One landscaper works 1.5 times as fast as another landscaper. Find their individual times if it takes 9 hours working together t
    13·1 answer
  • A mom bought her kids 3 cartons of milk for $1.25 each and 6 doughnuts. The total cost was $6.90. Write an equation to determine
    10·1 answer
  • Helps me solve this problem please
    5·1 answer
  • Need help with these two, please thanks
    6·2 answers
  • A. Y=x^2+3 B. Y=2/3x+6 C. Y=|x|+4 D .Y=2x-5 1. Identify the linear equations from the list. 2. State the constant rate of change
    11·1 answer
  • a rectangle has a length of 15 inches less than 5 times it’s width. If the area of the rectangle is 2750 square inches. what is
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!