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
koban [17]
3 years ago
12

X -1÷8 = 20 then X equals

Mathematics
2 answers:
Margaret [11]3 years ago
6 0
<span>x -1÷8 = 20 :

x - 1 / 8 = 20  ( multiply both sides by 8 ) :

x * 8 - 1/8 * 8 = 20 * 8

Refine:

8 x - 1 = 160  ( add  1 to both sides : )

8 x - 1 + 1 = 160 + 1

8 x = 161

Divide both sides by 8 :

8 x /8  = 161/8

x = 161 / 8  decimal = 20.125

hope this helps!

</span><span>
</span>
Ber [7]3 years ago
6 0
First, multiply each side by 8 to get x-1=160, then add one to each side to get x=161. So, in conclusion, x=161! Hope this helped!
You might be interested in
Which of the following best describes how to find the circumcenter of a triangle?
guapka [62]

Answer: B

Step-by-step explanation: :)

3 0
3 years ago
Standard Error from a Formula and a Bootstrap Distribution Sample A has a count of 30 successes with and Sample B has a count of
tia_tia [17]

Answer:

Using a formula, the standard error is: 0.052

Using bootstrap, the standard error is: 0.050

Comparison:

The calculated standard error using the formula is greater than the standard error using bootstrap

Step-by-step explanation:

Given

Sample A                          Sample B

x_A = 30                              x_B = 50

n_A = 100                             n_B =250

Solving (a): Standard error using formula

First, calculate the proportion of A

p_A = \frac{x_A}{n_A}

p_A = \frac{30}{100}

p_A = 0.30

The proportion of B

p_B = \frac{x_B}{n_B}

p_B = \frac{50}{250}

p_B = 0.20

The standard error is:

SE_{p_A-p_B} = \sqrt{\frac{p_A * (1 - p_A)}{n_A} + \frac{p_A * (1 - p_B)}{n_B}}

SE_{p_A-p_B} = \sqrt{\frac{0.30 * (1 - 0.30)}{100} + \frac{0.20* (1 - 0.20)}{250}}

SE_{p_A-p_B} = \sqrt{\frac{0.30 * 0.70}{100} + \frac{0.20* 0.80}{250}}

SE_{p_A-p_B} = \sqrt{\frac{0.21}{100} + \frac{0.16}{250}}

SE_{p_A-p_B} = \sqrt{0.0021+ 0.00064}

SE_{p_A-p_B} = \sqrt{0.00274}

SE_{p_A-p_B} = 0.052

Solving (a): Standard error using bootstrapping.

Following the below steps.

  • Open Statkey
  • Under Randomization Hypothesis Tests, select Test for Difference in Proportions
  • Click on Edit data, enter the appropriate data
  • Click on ok to generate samples
  • Click on Generate 1000 samples ---- <em>see attachment for the generated data</em>

From the randomization sample, we have:

Sample A                          Sample B

x_A = 23                              x_B = 57

n_A = 100                             n_B =250

p_A = 0.230                          p_A = 0.228

So, we have:

SE_{p_A-p_B} = \sqrt{\frac{p_A * (1 - p_A)}{n_A} + \frac{p_A * (1 - p_B)}{n_B}}

SE_{p_A-p_B} = \sqrt{\frac{0.23 * (1 - 0.23)}{100} + \frac{0.228* (1 - 0.228)}{250}}

SE_{p_A-p_B} = \sqrt{\frac{0.1771}{100} + \frac{0.176016}{250}}

SE_{p_A-p_B} = \sqrt{0.001771 + 0.000704064}

SE_{p_A-p_B} = \sqrt{0.002475064}

SE_{p_A-p_B} = 0.050

5 0
3 years ago
In first gear, or low gear, an automobile's engine runs about three times as fast as the drive shaft. In second gear, the engine
fredd [130]

Answer:

A 1367

Step-by-step explanation:


3 0
3 years ago
In the triangle ABC the measure of angle A is 2X +3 the measure of angle B is 4X +2 in the measure of angle C is 2X -1what are t
kvasek [131]

Answer:

hope you got a good grade o whateva

Step-by-step explanation:

im just trna get more questions

8 0
3 years ago
Pre calculus, trigonometry Given point M the ordered pair 6 times the square root of 3 comma negative 6 comma which is located o
Nikitich [7]

The possible form of the point (6√3, - 6) in polar form are (r₁, θ₁) = (12, 11π / 6), (r₂, θ₂) = (12, - π / 6).

<h3>How to derive the polar form of a point in rectangular form</h3>

In this problem we find a point in rectangular form, that is, a point of the form (x, y). We are asked to find the polar form of the point, that is, a point described by the following expression:

(r, θ)

Where:

  • r - Magnitude
  • θ - Direction, in radians

The magnitude is found by Pythagorean theorem:

r =√(x² + y²)

And the direction of the point is described by the following inverse trigonometric function:

θ = tan⁻¹ (y / x)

If we know that (x, y) = (6√3, - 6), then the point in polar form is:

r = √[(6√3)² + (- 6)²]

r = 12

θ = tan⁻¹ (- 6 / 6√3)

θ = tan⁻¹ (- √3 / 3)

θ = 11π / 6 rad / θ =  - π / 6 rad

There are two possible solutions: (r₁, θ₁) = (12, 11π / 6), (r₂, θ₂) = (12, - π / 6).

To learn more on point in polar form: brainly.com/question/13103661

#SPJ1

7 0
1 year ago
Other questions:
  • What is the answer? Please Help!
    13·1 answer
  • For two weeks, Mark recorded the color of the traffic light at the intersection of Acorn Street and Fifth Avenue as his bus appr
    14·1 answer
  • Do those two problems have the same answer?
    10·1 answer
  • The table shows the total time it took Samir to read 0,1,2, and 3 pages of the book. The table also list this information as ord
    11·1 answer
  • your teacher is giving you a test with 100 points containing 40 questions. there are two point and four point questions on the t
    13·1 answer
  • you get paid $8 an hour. you make $35 in tips. you make $167.00 in a week. how many hours did you work. write an equation to the
    5·2 answers
  • For the following distribution:
    11·1 answer
  • When a number is subtracted from 11, the result is 6 more than the number. Find the number.
    11·2 answers
  • 36. A function g is described below
    11·2 answers
  • Consider the quadratic function.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!