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
yan [13]
3 years ago
13

Can you solve and explain you would use in solving a 2 step equations

Mathematics
2 answers:
Leni [432]3 years ago
5 0

Answer:

I have 488 books in my library. 59 books are taken away, and then 159 books come to the library. How many books does the library have now?               488-59=429 429+159=588

Step-by-step explanation:

2 step problems have two steps, like (1+2)-3=0

ehidna [41]3 years ago
4 0

What you would use in a 2 step equations is to have more than one operation. Or to do a 2 - step - equation.

You have to simplify a lot of things.

You would use addition or subtraction and then multiplying or dividing.

And finally, you would get the answer for that variable.

For example, 2x+3=3*4

3x+3=3*4

3x+3=12

    -3   -3

--------------

3x=9

x=3

You might be interested in
the operation manager at a tire manufacturing company believes that the mean mileage of a tire is 20,138 miles, with a variance
Aleks [24]

The probability that the sample mean would be less than 19,448 miles is 0.9972

Given,

The mean mileage of a tire, μ = 20,138

The standard deviation, σ = \sqrt{10,304,100} = 3210

Sample size, n = 171

We have to find the probability that the sample mean would be less than 19,448 miles.

That is,

P(X < 19448)

Since the sample size in this instance is greater than 30, we can utilise the central limit theorem and the z score formula provided by:

z = (X - μ) / (σ/√n)

The following would be the sample mean's distribution:

X ≈ N (μ, σ/√n)

In this situation, the z score was found to be:

z = (19448 - 20138) / (3210/√171)

z = -690 / 245.48

z = 2.81

Using the conventional table, we get the following:

P(z < 2.81) = 0.9972

That is,

The probability that the sample mean would be less than 19,448 miles is 0.9972

Learn more about probability here;

brainly.com/question/17011174

#SPJ4

5 0
1 year ago
GQ ran 5 5/6 of a mile on Saturday. On Sunday
Alik [6]

Answer:

9 1/2

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What's y=2x in standard form of a linear equation
Slav-nsk [51]
<span>standard form of a linear equation is ax+by+c=
y=2x
y-2x=0
</span>
7 0
3 years ago
15 more than -8 is:<br><br> can i please have a answer
RoseWind [281]

Answer:

7

Step-by-step explanation:

15+-8=7

4 0
3 years ago
Read 2 more answers
Three businesswomen are trying to convene in Northwest Arkansas for a business meeting. The first (Woman 1) is arriving on a fli
boyakko [2]

Answer:

a) The probability mass function of X is then presented in the table below.

X | probability P(X=x) or p

0 | 0.001

1 | 0.032

2 | 0.283

3 | 0.684

b) The cumulative distribution function of X

Cdf = Σ pdf = P(X=0) + P(X=1) + P(X=2) + P(X=3)

= 1.000

c) The probability that at least two businesswomen arrive on time

P(X ≥ 2) = P(X=2) + P(X=3) = 0.967

d) Expected value of X = E(X) = 2.65

e) Standard deviation = 0.545

Step-by-step explanation:

The probability that the woman coming from Atlanta arrives on time = P(A) = 0.90

The probability that the woman coming from Atlanta DOES NOT arrive on time = P(A') = 1 - 0.90 = 0.10

The probability that the woman coming from Dallas arrives on time = P(B) = 0.95

The probability that the woman coming from Dallas DOES NOT arrive on time = P(B') = 1 - 0.95 = 0.05

The probability that the woman coming from Chicago arrives on time = P(C) = 0.80

The probability that the woman coming from Chicago DOES NOT arrive on time = P(C') = 1 - 0.80 = 0.20

Since X is the random variable that represents how many women arrive on time,

To evaluate the probability function, we will first obtain the probability that the number of women that arrive in time = 0, 1, 2, and 3.

First probability; that no woman arrives on time. X = 0

P(X=0) = P(A') × P(B') × P(C')

= 0.10 × 0.05 × 0.20

P(X=0) = 0.001

Second probability; that only one of the women arrive on time. X = 1

P(X=1) = [P(A) × P(B') × P(C')] + [P(A') × P(B) × P(C')] + [P(A') × P(B') × P(C)]

= [0.90 × 0.05 × 0.20] + [0.10 × 0.95 × 0.20] + [0.10 × 0.05 × 0.80]

= 0.009 + 0.019 + 0.004

P(X=1) = 0.032

Third probability; that only two women arrive on time. X = 2

P(X=2) = [P(A) × P(B) × P(C')] + [P(A) × P(B') × P(C)] + [P(A') × P(B) × P(C)]

= [0.90 × 0.95 × 0.20] + [0.90 × 0.05 × 0.80] + [0.10 × 0.95 × 0.80]

= 0.171 + 0.036 + 0.076

P(X=2) = 0.283

Fourth probability; that all 3 women arrive on time. X = 3

P(X=3) = P(A) × P(B) × P(C)

= 0.90 × 0.95 × 0.8

P(X=3) = 0.684

The probability mass function of X is then presented in the table below.

X | probability P(X=x) or p

0 | 0.001

1 | 0.032

2 | 0.283

3 | 0.684

b) The cumulative distribution function of X

Cdf = Σ pdf = P(X=0) + P(X=1) + P(X=2) + P(X=3)

= 0.001 + 0.032 + 0.283 + 0.684 = 1.000

c) The probability that at least two businesswomen arrive on time

P(X ≥ 2) = P(X=2) + P(X=3) = 0.283 + 0.684 = 0.967

d) Expected value of X

Expected value is given as

E(X) = Σ xᵢpᵢ

E(X) = (0)(0.001) + (1)(0.032) + (2)(0.283) + (3)(0.684) = 0 + 0.032 + 0.566 + 2.052 = 2.65

e) What is the standard deviation of X?

Standard deviation = √(variance)

Variance = Var(X) = Σx²p − μ²

μ = E(X) = 2.65

Σx²p = (0²)(0.001) + (1²)(0.032) + (2²)(0.283) + (3²)(0.684)

= (0)(0.001) + (1)(0.032) + (4)(0.283) + (9)(0.684)

= 0 + 0.032 + 1.132 + 6.156

= 7.32

Variance = Var(X) = 7.32 - 2.65² = 7.32 - 7.0225

Var(X) = 0.2975

Standard deviation = √(variance) = √0.2975

Standard deviation = 0.545

Hope this Helps!!!

8 0
3 years ago
Other questions:
  • What is the missing number in this sequence? 3,7,15, 63, 127
    15·1 answer
  • Find the value of x that makes a || b
    11·2 answers
  • What is 1/2 as a decimal​
    11·2 answers
  • What is 9.27 as a fraction
    15·2 answers
  • 4(f+3)=62 whats the value of f
    9·1 answer
  • Plane A has just 1 ton of fuel left and has requested plane B to refuel it. Plane B has 21 tons of fuel. Fuel transfer happens a
    11·2 answers
  • The function shown models the depth d (in inches) of snow on the ground during the first 9 hours of a snowstorm, where t is the
    14·1 answer
  • I need help! Quickly, please!
    5·1 answer
  • Help..mark brainliest the first correct answer!
    5·1 answer
  • 1) A 60 cm length of wire is used to form a rectangle. The
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!