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
serious [3.7K]
3 years ago
7

you borrow $90 from your grandmother. You pay back $15 each week. write an equation in standard form that represents the amount

owed y after x weeks.
Mathematics
1 answer:
mojhsa [17]3 years ago
8 0

Answer:

90-15x

Step-by-step explanation:

x being the number of weeks

You might be interested in
$2.59<br> $3.86<br> $2.17<br> $3.07
S_A_V [24]

Answer:

2.59

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Why do lenders usually charge a higher interest rate for secured loans?
Hatshy [7]

Answer:

dddddddddddddddddddddddddddd

8 0
2 years ago
The operation manager at a tire manufacturing company believes that the mean mileage of a tire is 48,564 miles, with a standard
DerKrebs [107]

Answer:

0.0091 = 0.91% probability that the sample mean would be less than 48,101 miles in a sample of 281 tires if the manager is correct

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central limit theorem:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 48564, \sigma = 3293, n = 281, s = \frac{3293}{\sqrt{281}} = 196.44

What is the probability that the sample mean would be less than 48,101 miles in a sample of 281 tires if the manager is correct?

This is the pvalue of Z when X = 48101. So

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

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{48101 - 48564}{196.44}

Z = -2.36

Z = -2.36 has a pvalue of 0.0091

0.0091 = 0.91% probability that the sample mean would be less than 48,101 miles in a sample of 281 tires if the manager is correct

6 0
3 years ago
Some one help ASAP PLEASE <br> Which expression represents 7 times the diffrence between 300 and 28?
pickupchik [31]

Answer:

Answer

Step-by-step explanation:

300-28= g x 7

4 0
3 years ago
What algebraic expression models the word phrase three fewer than the sum of c and d?
Serjik [45]
" the sum " means add

(c + d) - 3 <== ur expression
4 0
3 years ago
Read 2 more answers
Other questions:
  • Jamal works at the recreation center 15 hours a week during the school year he earns $ 8.75 an hour in a typical month he works
    13·2 answers
  • The area of a room is 396 square feet. The length is (x + 8) feet and the width is (x + 4) feet. Find the dimensions of the room
    5·2 answers
  • Let ​ f(x)=x2−6x−27 ​ . Enter the x-intercepts of the quadratic function in the boxes. x = and x =
    8·2 answers
  • What is the most hard subject in math
    7·1 answer
  • Grade 11 maths investigation ​
    15·1 answer
  • If f(1) = 8 and f(n) = -5f(n-1) then find the value of f(6).​
    13·2 answers
  • What is the solution to 4 times 3x = 36?
    9·2 answers
  • Which of the following shows (2x + y) 4 (4 is small) In expanded notation?
    9·1 answer
  • Modeling an Equation
    15·2 answers
  • Use the triangle to answer the question.Find the value of x. Round to the nearest degree.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!