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
tresset_1 [31]
2 years ago
5

Help in math plzzddddddddddddddddd

Mathematics
1 answer:
melomori [17]2 years ago
3 0

Answer:

first one: 3 1/3 = 7/3 second: 2 3/4 = 11/4

third one: 3 1/3 + 2 3/4 = 10/3 + 11/4 = 40/12 + 44/12

there fore the answer is: 84/12 or 7

this may help you the first one question only.

You might be interested in
It is known that 10% of the 9-year old children in a town have three siblings. Fifteen 9-year old children are selected at rando
inn [45]

Using the binomial distribution, it is found that there is a 0.0555 = 5.55% probability that more than 3 of these selected children have three siblings.

<h3>What is the binomial distribution formula?</h3>

The formula is:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

C_{n,x} = \frac{n!}{x!(n-x)!}

The parameters are:

  • x is the number of successes.
  • n is the number of trials.
  • p is the probability of a success on a single trial.

In this problem, for the parameters, we consider that:

  • 10% of the 9-year old children in a town have three siblings, hence p = 0.1.
  • Fifteen 9-year old children are selected at random, hence n = 15.

The probability that more than 3 of these selected children have three siblings is given by:

P(X > 3) = 1 - P(X \leq 3)

In which:

P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)

Then:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{15,0}.(0.1)^{0}.(0.9)^{15} = 0.2059

P(X = 1) = C_{15,1}.(0.1)^{1}.(0.9)^{14} = 0.3432

P(X = 2) = C_{15,2}.(0.1)^{2}.(0.9)^{13} = 0.2669

P(X = 3) = C_{15,3}.(0.1)^{3}.(0.9)^{12} = 0.1285

P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) = 0.2059 + 0.3432 + 0.2669 + 0.1285 = 0.9445

P(X > 3) = 1 - 0.9445 = 0.0555

0.0555 = 5.55% probability that more than 3 of these selected children have three siblings.

More can be learned about the binomial distribution at brainly.com/question/24863377

5 0
1 year ago
A tetrahedron is a triangular pyramid whose four faces are identical equilateral triangles. The total lateral surface area is 93
Westkost [7]

Answer:

SA = 124 cm²

Step-by-step explanation:

The lateral surface area is the area of all sides besides that base, so 93 cm² is the sum of 3 sides of the tetrahedron.  

93/3 = 31 cm² per side, there are 4 sides, so 31(4) = 123 cm² is the total surface area

6 0
3 years ago
Can someone pls help? Thx
sergey [27]
Your answer would be -3/4n+3/8 because 1/4•-3/1n would be -3/4n and then 1/4•3/2 would be 3/8 so your answer would then be -3/4n+3/8.
5 0
3 years ago
Write an expression that is equivalent to three over four(5z + 16).
klio [65]
Your answer is B. Using the distributive property, 3/4 • 5z equals 15/4z, which can't be simplified. Then 3/4 of 16 is 12. If you divide 16 by 4 (the denominator) and then multiply by 3 (the numerator) that yields your answer.
8 0
3 years ago
Triangle ABC has angle measures as shown A x-5 B 3x+30 C 35 qhat is the value x
Vinvika [58]

Answer:

x=30\ degrees

m

m

Step-by-step explanation:

we know that

The sum of interior angles in a triangle must be equal to 180 degrees

so

(x-5)+(3x+30)+(35)=180\°

solve for x

4x=180\°-60\°

4x=120\°

x=30\°

m

m

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which, if any, of
    14·1 answer
  • John took 45 minutes to bicycle to his grandmother's house, a total of four kilometers. what was his speed in km/hr?
    12·1 answer
  • One teacher wants to give each student 9/10 of a slice of pizza. If the teacher has 9 slices of pizza, then how many students wi
    9·1 answer
  • an air conditioning system can circulate 290 cubic feet of air per minute how many cubic yards of air can it circulate per minte
    11·1 answer
  • Y = x2 + 3x – 9<br> Linear<br> Quadratic<br> Exponential
    5·2 answers
  • HELP PLEASE!!!! Im not good with math PLEASE HELP ASAP!!!
    10·1 answer
  • Find the median, first quartile, third quartile, and interquartile range of the data.
    14·2 answers
  • The quotient of a number and-2
    6·1 answer
  • &lt;~~• ¥ Pls HELP me!! ¥ • ~~&gt;
    12·1 answer
  • 6,000 people voted in a town election. Of the two candidates, the winning candidate received 4,000 more votes than the losing ca
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!