2/3*5 6*8 simplified please help

The mean temperature for the first 7 days in January was 6 degrees.The temperature on the 8 days was 10 degrees . What is the me

kolezko [41]

Answer: The mean temperature for the first eight days is 6.5 degrees

Step-by-step explanation: The most important piece of clue has been given which is the mean (average) for the observed data set, which is 7 days.

Note that the formula for the mean of a data set is derived as;

Mean = ∑x / f

Where ∑x is the summation of all observed data set and f is the number of data observed, that is 7. The formula now becomes;

6 = ∑x / 7

By cross multiplication, we now have,

6 * 7 = ∑x

42 = ∑x

This means the addition of all temperature observed on the first 7 days is 42. The temperature on the eighth day is now given as 10 degrees, this means the summation of all observed data for the first eight days would become 42 + 10 which equals 52. Therefore when calculating the mean for the first eight days, ∑x is now 52. The formula for the first eight days therefore is derived as follows;

Mean = ∑x / 8

Mean = 52 / 8

Mean = 6.5

The calculations therefore show that the mean temperature for the first eight days in January is 6.5 degrees

3 0

4 years ago

What value is the independent variable and the dependent variable represents to ?

Shkiper50 [21]

Answer:

Step-by-step explanation:

Independent Variable

The independent variable is the condition that you change in an experiment. It is the variable you control. It is called independent because its value does not depend on and is not affected by the state of any other variable in the experiment. Sometimes you may hear this variable called the "controlled variable" because it is the one that is changed. Do not confuse it with a "control variable," which is a variable that is purposely held constant so that it can't affect the outcome of the experiment.

Dependent Variable

The dependent variable is the condition that you measure in an experiment. You are assessing how it responds to a change in the independent variable, so you can think of it as depending on the independent variable. Sometimes the dependent variable is called the "responding variable."

4 0

3 years ago

Write each statement as an algebraic expression. The sum of a number c and its square.

Nikitich [7]

A sum means that two numbers are added together. A square means that a number is raised to the second power.

The sum of a number c and its square can be written with this algebraic expression:

$c + c^{2}$

3 0

3 years ago

A family drives an average speed of 60 miles per hour on a trip from Pensacola to Orlando.

kozerog [31]

Answer:

7 3/10 hours or 7.3 hours

Step-by-step explanation:

We need to find two numbers that are multiples of 60 and close to 438

60*7 = 420

60*8 = 480

7<h<8

B. 438/60 = 7 18/60 = 7 3/10

7 0

3 years ago

Three departments of factory employ a total of 1274 people. Department B employs 70 people more than department A and department

V125BC [204]

Answer:

No . of people in department A = 350

No . of people in department B = 420

No . of people in department C = 504

Step-by-step explanation:

Let the no . of people in department A be x

Given

Department B employs 70 people more than department A

Therefore,

no . of people in department B = x + 70

Again Given

department C employs 84 more workers than department B.

Therefore,

no . of people in department c = no . of people in department B + 84

no . of people in department c = x + 70 + 84 = x + 154

Total no. of people in all the department in terms of x = x + x+ 70+ x+154

Total no. of people in all the department in terms of x = 3x +224

Problem says

Three departments of factory employ a total of 1274 people

Therefore

3x +224 = 1274

=> 3x = 1274 - 224 = 1050

=> x = 1050/3 = 350

Thus,

no . of people in department A = x = 350

no . of people in department B = x + 70 = 350 + 70 = 420

no . of people in department c = x + 154 = 350 + 154 = 504

6 0

4 years ago