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
elena-s [515]
3 years ago
12

Help! This is for Patterns, Functions and Algebra!

Mathematics
1 answer:
ASHA 777 [7]3 years ago
5 0

Answer:

im pretty sure the Answers b, but i've never done this before so sorry if its not

Step-by-step explanation:

You might be interested in
10. If $5000 is invested in an account that compounds interest
Varvara68 [4.7K]

Answer:

5000 \times  {1.075}^{10}  = 10305.16

6 0
3 years ago
A number, m, is rounded to 1 decimal place.
Alla [95]

Answer:

Dfrew

Step-by-step explanation:

8 0
3 years ago
An environmental group conducted a study to determine whether crows in a certain region were ingesting food containing unhealthy
nydimaria [60]

Part A

Given info:

  • xbar = sample mean = 4.90 ppm
  • s = sample standard deviation = 1.12 ppm
  • n = 23 = sample size

Because n > 30 is not true, and we don't know the population standard deviation (sigma), this means we must use a T distribution.

The degrees of freedom here are n-1 = 23-1 = 22.

At 90% confidence and the degrees of freedom mentioned, the t critical value is roughly t = 1.717

Use a T distribution table or calculator to determine this. If you don't have a calculator for the task, then you can search out "inverse T calculator" and there are tons of free options to pick from.

The margin of error E is

E = t*s/sqrt(n)

E = 1.717*1.12/sqrt(23)

E = 0.400982

This is approximate and accurate to 6 decimal places.

The confidence interval is going to be xbar plus or minus that E value

L = lower bound = xbar - E = 4.90 - 0.400982 = 4.499018 = 4.50

U = upper bound = xbar + E = 4.90 + 0.400982 = 5.300982 = 5.30

The confidence interval in the format of (L, U) is (4.50, 5.30)

You could also express it as the format L < mu < U and it would be 4.50 < mu < 5.30; however, I'll stick to the first method.

<h3>Answer:  (4.50, 5.30)</h3>

=====================================================

Part B

Since we know sigma = 2.6 is the population standard deviation, we can use a Z distribution now.

At 90% confidence, the z critical value is roughly 1.645; use a table or calculator to determine this.

n = \left(\frac{z*\sigma}{E}\right)^2\\\\n \approx \left(\frac{1.645*2.6}{0.03}\right)^2\\\\n \approx 20325.254444 \\\\

Round this up to the nearest integer to get 20326. For min sample size problems, <u>always</u> round up.

<h3>Answer: 20326</h3>
6 0
2 years ago
X=3y + 1<br> 2x + 4y =12
Alika [10]

Answer:

the solution is (4, 1).

Step-by-step explanation:

The goal here is to "solve this system of linear equations."  You need to share that along with the equations.

We can begin the solution by substituting 3y + 1 for x in the second equation:

2(3y + 1) + 4y = 12

Performing the multiplication, we get 6y + 2 + 4y = 12, or 10y = 10.

Then y must be 1.

Substituting 1 for y in the first equation, we get x = 3(1) + 1 = 4

Thus, the solution is (4, 1).

4 0
3 years ago
1) Write an equation that can be used to solve for the missing angles. (5pts)
algol13

Answer:

i dont know angles

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • What is the volume of the pyramid? A. 142 cm3 B. 420 cm3 C. 484 cm2 D. 139 cm3
    5·2 answers
  • How do you subtract an integer from another integer without using a number line
    11·1 answer
  • Find the approximate volume of the figure below, composed of a cone, a cylinder, and a hemisphere. If necessary, round your answ
    8·1 answer
  • the attendence at a school football game was 350. tickets for adults cost $2.25 compared to $1.00 for children. if the total rec
    9·1 answer
  • Math Help! 62 points for answer(s) Right answers only, and credible reasoning please.
    12·2 answers
  • Divide 1 by 1000 and round to the whole number
    9·1 answer
  • Which estimation could be used to make sure the answer is reasonable?
    10·1 answer
  • Pls help me I will give brainliest
    6·2 answers
  • There are 12 red marbles in a bag. The ratio of the total number of marbles in the bag to the number of red marbles in the bag i
    14·1 answer
  • Identify the type of sampling method used.A trucking company places their office phone number on the back of all of their vehicl
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!