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
klemol [59]
3 years ago
9

I NEED HELP PLEASE !!!! REALLY REALLY NEED HELP

Mathematics
1 answer:
Nata [24]3 years ago
6 0

Answer:

This is very easy

use your law of indices and find the LCM of those with minus and plus signs

You might be interested in
Suppose we roll a fair six-sided die 20 times and draw ten cards from a standard 52-card deck. Let X be the number of "6"s rolle
Lera25 [3.4K]

Answer:

a) Expected value = 6.406

Variance = 4.905

Standard deviation = 2.45

b) The probability is 0.08547

Step-by-step explanation:

a) Let's suppose that:

X₁ = number of 6´s

X₂ = number of Jack, Queen, King or Aces

The mean of X₁ is:

MeanX₁ = n * p = 20 * (1/6) = 3.33

The variance of X₁ is:

Var-X_{1} =np(1-p)=3.33(1-(1/6))=2.775

The mean of X₂ is:

MeanX₂ = 10 * (16/52) = 3.076

The variance of X₂ is:

Var-X_{2} =3.076(1-(16/52))=2.13

The expect value of X is:

Xexp = MeanX₁ + MeanX₂ = 3.33 + 3.076 = 6.406

The variance of X is:

VarX = VarX₁ + VarX₂ = 2.775 + 2.13 = 4.905

The standard deviation is:

Xdevi = 4.905/2 = 2.45

b) The probability of drawing at least five six out of 20 rolls is equal to:

∑(1/6)ˣ(5/6)²⁰⁻ˣ = 0.231 with x = 5

The probability of at least 4 Jack, Queen, Kings or Aces is:

∑(16/52)ˣ(1-(16/52))¹⁰⁻ˣ = 0.37 with x = 4

The probability of given event is equal to:

P = 0.231 * 0.37 = 0.08547

5 0
3 years ago
10 times as much as 2000 is 1 tenth of
Pani-rosa [81]
10 times as much as 2000 is 1/10 of 200,000. I believe.
7 0
3 years ago
Classify the triangle.<br> A. equilateral<br> B. scalene<br> C. isosceles
____ [38]

Answer:

Isosceles

Step-by-step explanation:

Why? Because it has 2 congruent sides

3 0
3 years ago
Read 2 more answers
Convert these sums into decimal.
alex41 [277]
A) 0.6
b) 0.65
c) 0.104
d) 0.32
7 0
3 years ago
A multi level parking lot has 6 levels and there are total of 1,327 parking spots.
MrRissso [65]

Answer: (1) There are 233 parking spots on the top level

(2) There are 72 parking spots reserved for drivers with disabilities

(3) There are 970 spots for hourly parking

(4) He would spend $7200 for parking in a year

Step-by-step explanation: In the first instance, there is a total of 1327 parking spots altogether allocated into various categories.

(1) There are 6 levels in all, and the first level has 162 parking spots. herefore the remaining 5 levels would have 1165 parking spots left as shown below;

Remainder = 1327 - 162

Remainder = 1165

If however the remaining 1165 parking spots are distributed equally among the other 5 levels, then each level would have 233 parking spots each as shown below;

Five levels = 1165

Each level = 1165/5

Each level = 233

Therefore the top level has 233 parking spots

(2) On each level (out of all 6 levels), there are 12 spots reserved for drivers with disability. Therefore at all parking levels you would have 72 spots as shown;

Reserved spot per level = 12

Reserved spot for 6 levels = 12 * 6

Reserved spot for 6 levels = 72

Therefore there are 72 spots reserved for driver with disability

(3) Other than the spots reserved for drivers with disability (72), there are 285 parking spots for monthly rental. The rest are for hourly parking, and this is calculated as shown;

Hourly parking + monthly rental + reserved parking = 1327

Hourly parking + 285 + 72 = 1327

Hourly parking + 357 = 1327

Hourly parking = 1327 - 357

Hourly parking = 970

Therefore there are 970 spots available for hourly parking.

(4) If the daily parking rate is $30, and Jack parks his car for 5 days in a week, then he would spend

30 * 5 = 150

If he parks for 4 weeks in a month, then he would spend

150 * 4 = 600

Therefore to pay for parking in a year (12 months) he would spend

600 * 12 = 7200

Therefore he would spend $7,200 for parking in a year

4 0
3 years ago
Other questions:
  • Joel sells ice cream cones at the county fair. He has to rent the equipment for $28 and spent $.33 on a gradients for each accou
    5·1 answer
  • from a hot air balloon 2500 feet above the ground you see it a clearing whose angle of depression is 25 degrees.To the nearest f
    7·1 answer
  • Zeke's birthday party will cost $6 if he invites 3 guests. If there are 8 guests,
    8·1 answer
  • If g(x)= 3x is graphed on a coordinate plane, what is the y-intercept of the graph?
    8·1 answer
  • Answer please.............
    9·1 answer
  • Veronica tells another classmate that ΔHAT is congruent to ΔPAM because of the AAA Theorem. Is Veronica correct in what she tell
    11·1 answer
  • Solve the math problem
    10·2 answers
  • The area of the rectangle is 3x² + 7x + 2 with a width of (x + 2) meters, write the
    11·1 answer
  • PLS HELP ASAP ILL GIVE BRAINLKEST PLS THANKS ASAP PLS
    12·1 answer
  • the EM wave emitted by the sun and responsible for heating the Earths atmosphere due to green house effect is
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!