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
EastWind [94]
3 years ago
12

when Sally picks any number between 1 and 20, doubles it, adds 6, divides by 2 and subtracts 3, she always gets the number she s

tarted with. why?
Mathematics
2 answers:
Reil [10]3 years ago
7 0
I think it might be because 2 and 3 are factors of 6. 
Ira Lisetskai [31]3 years ago
3 0
Lets say number is x

doubles it (2x)
adds 6 (2x+6)
divide it by 2 (2x+6=2(x+3) so 2(x+3) divided by 2=x+3)
subtract 3 (x+3-3=x)

becasue math is fun, brah
You might be interested in
The measure of one a cite angle of a right triangle is 6 less than twice the measure of the other acute angle find the measure o
jeka57 [31]

Answer:

32°, 58°

Step-by-step explanation:

Let one acute angle measure x.

The other acute angle measures 2x - 6.

The sum of the measures of the acute angles of a right triangle is 90.

x + 2x - 6 = 90

3x - 6 = 90

3x = 96

x = 32

2x - 6 = 2(32) - 6 = 58

Answer: 32°, 58°

8 0
2 years ago
a recent study determined that of every 1,000 americans age 65 or older, 269 have been diagnosed with diabetes. it is estimated
shusha [124]
14,795,000 people out of 55,000,000
6 0
3 years ago
True or false: you flip the sign every time you multiply or divide when you're solving an
larisa [96]

False. You only flip when the number you are multiplying/dividing is negative.

5 0
2 years ago
Consider the continuous random variable x, which has a uniform distribution over the interval from 110 to 150. The probability t
Virty [35]

Answer:

The probability that x will take on a value between 120 and 125 is 0.14145

Step-by-step explanation:

For uniform distribution between a & b

Mean, xbar = (a + b)/2

Standard deviation, σ = √((b-a)²/12)

For 110 and 150,

Mean, xbar = (150 + 110)/2 = 130

Standard deviation, σ = √((150-110)²/12 = 11.55

To find the probability that x will take on a value between 120 and 125

We need to standardize 120 & 125

z = (x - xbar)/σ = (120 - 130)/11.55 = - 0.87

z = (x - xbar)/σ = (125 - 130)/11.55 = - 0.43

P(120 < x < 125) = P(-0.87 < x < -0.43)

We'll use data from the normal probability table for these probabilities

P(120 < x < 125) = P(-0.87 < x < -0.43) = P(z ≤ -0.43) - P(z ≤ -0.86) = 0.33360 - 0.19215 = 0.14145

Hope this Helps!!!

3 0
3 years ago
(-5, 4) and (4,1)<br> What is the distance between the two points rounded to the nearest tenth
mr Goodwill [35]

Answer:

AB=9.49

Step-by-step explanation:

plz mark as brainliest if it helps

6 0
3 years ago
Other questions:
  • Preston bought a drum set priced at 187.90. The sales tax was found by multiplying the price of the drum set by 0.08. What was t
    5·1 answer
  • Which equation is equivalent to 2 Superscript 4 x Baseline = 8 Superscript x minus 3?
    13·2 answers
  • Avery's yard has an area of 5/4 acres, and Logan's yard has an area of 3/2 acres. What is the ratio of the area of Avery's yard
    8·2 answers
  • The figure shows triangle ABC inscribed in circle D.
    5·2 answers
  • Fill in the blank with the correct response.<br><br> 11 ft = ____in.
    9·2 answers
  • n 11 -5 + 1 = -5 swered out of on Step Property Used Step One Step Two Step Three Step Four Multiplication Property of Equality
    14·1 answer
  • Tell me ASAP plz!! Btw Patsy’s Pasta house uses 3/4 of a cup of sauce for every 12 ounces of pasta...good luck
    12·1 answer
  • Find the value if k(2,3)is a point on graph of the equation x - ky +8= 0​
    5·2 answers
  • PLEASE help me <br> this is a 45°-45°-90° triangle. <br> solve for a.
    11·1 answer
  • Triangle not drawn to scale
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!