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
nalin [4]
4 years ago
9

Raffle tickets are being sold for a fundraiser. The function a(n) relates the

Mathematics
1 answer:
Vlada [557]4 years ago
8 0

Answer:

If the function is

A(n) = 4n -25

and we wish to get the inverse function N(a)

We let

A(n) = a

n = N(a)

Plugging in the values

a = 4 N(a) - 25

Arranging the equation:

4 N(a) = a + 25

N(a) = (a + 25) /4

The answer is

N(a) = (a + 25) /4

Step-by-step explanation:

You might be interested in
The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days.
inessss [21]

The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days.

That is,

Consider X be the length of the pregnancy

Mean and standard deviation of the length of the pregnancy.

Mean \mu =266\\

Standard deviation \sigma =15

For part (a) , to find the probability of a pregnancy lasting 308 days or longer:

That is, to find P(X\geq 308)

Using normal distribution,

z=\frac{X-\mu}{\sigma}

z=\frac{308-266}{15}

=\frac{42}{15}

Thus z=2.8

So P\left (X\geq 308  \right )=1-P(X

=1-P(z

=1-Table\:  value\:  of\:  2.8

=1-0.99744

=0.00256

Thus the probability of a pregnancy lasting 308 days or longer is given by 0.00256.

This the answer for part(a): 0.00256

For part(b), to find the length that separates premature babies from those who are not premature.

Given that the length of pregnancy is in the lowest 3​%.

The z-value for the lowest of 3% is -1.8808

Then X=\frac{X-\mu}{\sigma}\Rightarrow X=z*\sigma+\mu

This implies X=-1.8808*15+266=237.788

Thus the babies who are born on or before 238 days are considered to be premature.

5 0
3 years ago
10) La diferencia entre 17 y 1.234 es :
Roman55 [17]

Answer:

15.766

Step-by-step explanation:

17 menos 1.234 es 15

4 0
3 years ago
Evaluate the expression 3 x<br> {10 +1} +5.
Tanya [424]

Answer:

38

Step-by-step explanation:

3 x {10 +1} +5.

PEMDAS

Parentheses first

3 x {11} +5.

Then multiply and divide

33+5

38

4 0
3 years ago
Read 2 more answers
Write an equation with a variable x and solve it to find these unknown amounts. a. 18 more than double a number is divided by 5
Harlamova29_29 [7]

Answer:

x = 21

Step-by-step explanation:

1. Write the equation

(18 + 2x) ÷ 5 = 12

2. Multiply both sides by 5

18 + 2x = 60

3. Subtract 18 from both sides

2x = 42

4. Solve for x by dividing both sides by 2

x = 21

4 0
3 years ago
Read 2 more answers
Solve the equation<br> 4.173 - 10x – 2 = 42
IrinaK [193]
The answer is: x=-3.9827
5 0
3 years ago
Other questions:
  • A parabola can be represented by the equation x2 = 2y. What are the coordinates of the focus and the equation of the directrix?
    5·2 answers
  • Please Help! Hurry!
    9·1 answer
  • PLEASE ANSWER THIS IS THE THIRD TIME IVE POSTED THIS
    15·1 answer
  • Over the weekend, Brady and Jack drove to Key West to go scuba diving. Now they're preparing to go home. Brady needs gas for his
    5·2 answers
  • on average Shawnty drinks a half of a 6 ounce glass of water and 2/3 hour how much water does she drink in an hour
    13·1 answer
  • Write the word sentence as an equation. 12 less than a number m equals 20.
    13·1 answer
  • Hii i really need help!!
    7·2 answers
  • Factorise completely X^4-5X^3+6X^2+4X+8≤0
    14·1 answer
  • PLIS HELPPP I DON'T UNDERSTAND THIS
    7·2 answers
  • Kylie Jenner's gym membership
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!