What is the error shown above in the picture

Mathematics

1 answer:

bixtya [17]4 years ago

3 0

The error is that -2 times -5 is 10 not -10. Then carry on from there because that error meant the rest is wrong as well.

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You are ordering T-shirt with your school's mascot printed on them. Each T-shirt cost $4.75. The printer charges a setup fee of

masya89 [10]

Answer:

1. n(4.75+30+2.50)

2. 4.75n+30n+2.50n

Step-by-step explanation:

n is the number of shirts they buy. It says that each shirt costs $4.75, and for each shirt they add an extra $30 and $2.50 for the setup fee and to peint each shirt. The word each shows that you have to times. You have to times n by each number or to make it shorter put all three numbers in parenthesis put the n ouside of the parenthesis.

Hope that helps.

4 0

3 years ago

Read 2 more answers

A study shows that employees who begin their workday at 9:00 a.m. vary their times of arrival uniformly from 8:40 a.m. to 9:30 a

arlik [135]

Answer:

20 %

Step-by-step explanation:

This question can be easily solved using The Rectangular, or Uniform Distribution of Probability

The probability of people arriving between 8:40 am and 9:30 am is uniformly distributed and can be represented by a rectangle attached as figure 1 .

The total area of this green rectangle must be equal to 1 because the total probability is always equal to 1.

We are interested in finding the red region which is for the time range of 9:00 am to 9:10am shown in the figure 2 attached:

First we need to find the Height of this rectangle:

To find the value of Height:

The formula for the area of rectangle = Base x Height

Base = b – a

In our case b – a is the difference in time from 8:40 am to 9:30 am

So, b – a = 50 (mins)

Similarly, Height x Base = 1 because max probability is equal to 1

Height = 1/ (b – a) because Base x Height must be equal to 1 (max probability)

Height = 1/ (b – a )

Height = 1/(Base)

Height = 1/50

Now once we have the value of Height we can find the desired probability of any region by multiplying the Height with the given time range in the question. In our case the time range is 9:00 am to 9:10 am which means 10(mins). Therefore,

Probability = Height x 10

Probability = 1/50 x 10

Probability = 1/5

To convert it into percentage

1/5 x 100% = 20% (Answer)