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
Usimov [2.4K]
3 years ago
6

If AC = x + 5 and AB = 3x - 1... what is the length of BC?

Mathematics
1 answer:
Hatshy [7]3 years ago
4 0
If B is the midpoint of AC, then |AB| = |AC|.
|AB| = 3x + 2
|BC| = 5x - 10
Therefore we have the equation:
3x + 2 = 5x - 10     |subtract 2 from both sides
3x = 5x - 12      |subtract 5x from both sides
-2x = -12      |divide both sides by (-2)
x = 6

Read more on Brainly.com - brainly.com/question/11324096#readmore
You might be interested in
100 POINTS! OMG SOLVE THIS.
poizon [28]
ACB is 12 cm, so A to b is half of 12, so the total would be 6 cm (or units)
3 0
3 years ago
Read 2 more answers
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained i
alex41 [277]

Answer:

sample size if he uses a previous estimate of 32​% is 523

sample size if he does not use any prior​ estimates is 601

Step-by-step explanation:

estimate E = 4 percentage = 0.04

confidence Cl = 95% = 0.95

previous estimate p = 32% = 0.32

q = 1 - 0.32 = 0.68

to find out

size of sample

solution

first we calculate z value for 95% confidence E = 0.04 is 1.96

from probability P(-1.96 < z < 1.96) = 0.95)

here z = 1.96

so in 1st part size of sample we know

E = z × \sqrt{pq/n}

put all value E, z p and q and we get n

n = (z/E)² ×p×q

n = (1.96/0.04)² ×0.32×0.68

n = 523

sample size if he uses a previous estimate of 32​% is 523

now in 2nd part we take p = 0.5

so n will be

n = (z/E)² ×p×q

n = (1.96/0.04)² ×0.5×0.5

n = 601

sample size if he does not use any prior​ estimates is 601

6 0
3 years ago
Simplify 143.87x34.65x87.78+12.63-19.63 to the nearest tenth.
lesya692 [45]

Answer:

437584.68

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
If, in 7 years, Susan will be 2 times as old as she was 3 years ago, what is Susan’s present age?
pochemuha

Answer:

13

Step-by-step explanation:

Set Susan's present age as x, her age from 3 years ago as x-3, and her age in three years as 2(x-3)

Since her age in seven years = 2 times as old as she way 3 years ago, set up the equation:

x+7 = 2(x-3)

x+7 = 2x-6

x = 13

3 0
2 years ago
Help me pls thank you alot!
damaskus [11]
Your answer will be -1/7
4 0
2 years ago
Read 2 more answers
Other questions:
  • Angel ate 2/3 of the chicken wings that were on the platter. How many chicken wings were on the platter if he ate 8 wings?
    15·1 answer
  • Help? &gt;K12&lt;
    15·1 answer
  • What is the solution to this system of equations? 3x + y = 17 x + 2y = 49
    12·1 answer
  • Jan bought a blazer for 39.90. The price of the blazer was $38. What sales tax rate was she charged for this blazer?
    13·2 answers
  • Is milk souring a chemical or physical change
    11·2 answers
  • Can you please help me write an expression that represents the sum of a number and 12
    5·2 answers
  • PLS HURRY!!!!!! WILL GIVE BRAINLIEST!!!! Explain the process to solve the equation. Use proper vocabulary in your explanation. 1
    9·2 answers
  • I need halp on this question plzz and ty
    12·1 answer
  • Find x.<br> (Please show steps!)
    11·1 answer
  • A map of Levi’s property is being made with a scale of 1 centimeters: 2 meters. What is the scale factor?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!