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
timofeeve [1]
2 years ago
11

I need help I don't know how to do this​

Mathematics
1 answer:
Sidana [21]2 years ago
5 0

Answer:

x\geq 23

Step-by-step explanation:

This equation can simply be solved by adding 15 to both sides.

To graph, draw a closed point at the center of the line and darken the area to the right of it.

You might be interested in
The length of time to complete a door assembly on an automobile factory assembly line is normally distributed with a mean of 6.7
hram777 [196]
We need to work out the z-value of each question to work out the probability

Question a)

We have
X = 5 minutes
The mean, μ = 6.7 minutes
Standard deviation, σ = 2.2 minutes
z-score = (X - μ) / σ = (5 - 6.7) / 2.2 = -0.77

We want to find the probability of z < -0.77 so we read the z-table for the value of z on the left of -0.77 we have the probability P(z< -0.77) = 0.2206

The table is attached in picture 1 below

The probability of assembly time less than 5 minutes is 0.2206 = 22.06%

Question b)

z-score = (10-5) / 2.2 = 2.27

Reading the z-table for P(z<2.27) = 0.9884
The table reading is shown in the second picture below

The probability the assembly time will be less than 10 minutes is 0.9884

We can use this information to find the probability of the assembly time will be more than 10 minutes  = 1 - 0.9884 = 0.0116 = 1.16%

Question c)

The value of z between 5 minutes and 10 minutes is

P(-0.77<z<2.27) = P(z<2.27) - P(z< -0.77)
P(-0.77<z<2.27) = 0.9884 - 0.2206 = 0.7678 = 76.78%


6 0
3 years ago
a man drives x miles the first day, y miles the second day, and z miles the third day. the averge mileage covered per day is
statuscvo [17]
The average mileage covered per day is = number of miles / number of days.

The average mileage covered per day is =(x+y+z)/3
6 0
3 years ago
At the Foremost State Bank the average savings account balance in 2012 was $1900. A random sample of 45 savings account balanes
lakkis [162]

Answer:

The calculated  |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Mean of the Population = 1900

Given random sample size 'n' =  45

Mean of the sample x⁻ = 1000

Standard deviation of the sample = 225

<u><em>Null Hypothesis</em></u>:-

There is no difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012.

<u><em>Alternative Hypothesis</em></u> :-

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

<u><em>Step(ii</em></u>):-

Test statistic

        t = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }

        t = \frac{1000-1900 }{\frac{225}{\sqrt{45} } }

       t = -900 /33.54 = -26.517

      |t| = |-26.517|=26.517

Degrees of freedom

                       γ = n-1 = 45-1 =44

t₍₀.₀₁ , ₄₄₎ = 2.326

The calculated  |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

4 0
3 years ago
A system of equations has 1 solution. If 4x - y = 5 is one of the equations, which could be the other equation?
Lera25 [3.4K]
4x - y = 5 is an verb like 4 - 5
4 0
3 years ago
Find the area. Will mark brainliest.
AleksAgata [21]

Answer:

Sorry if I get it wrong:

Answer: 3,840in

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • EASY— get marked brainliest!!!
    15·1 answer
  • The weight of an organ in adult males has a​ bell-shaped distribution with a mean of 325 grams and a standard deviation of 25 gr
    9·1 answer
  • This is my first time, but my question is what is 7/8 of 20?
    5·2 answers
  • (1 point)
    12·1 answer
  • Which line plot displays a data set with an outlier?
    10·2 answers
  • I need help ASAP . Brainlist will be given !!
    9·1 answer
  • HELP ASAP<br><br> Select the real-world problem that could be solved using a proportion.
    6·1 answer
  • Two fish tanks have measurements as shown. Which tank has a greater volume? How much greater is its volume?
    9·1 answer
  • At approximately what angle does the wire meet the ground? 33.6° 39.8° 50.2° 56.4°
    12·1 answer
  • the LSRL after an exponential transformation is lof y=0.986 + 3.149x. what is the exponential form of the regression
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!