MATHEMATICS COLLEGE

What is the mean of 2,4,6,6,9 ?

Answers

Answer 1
Answer:

5.40

2 + 4 + 6 + 6 + 9 = 27

27 / 5 = 5.40
Answer 2
Answer:

Answer:

5.4

Step-by-step explanation:

Total numbers: 5

Sum of numbers: 27

Mean value: 5.4

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What the answer to this math problom

Answers

Step-by-step explanation:

S=b*h/2=8*10/2=40m2

40*4=160m²

Answer:

60 m2

Step-by-step

i did that before hope this helps :)

A regular polygon has an interior angle of 172º.
Find the number of sides of this polygon.

Answers

Answer:

45 sides

Step-by-step explanation:

If each of the interior angles is 172 degrees, then each of the exterior angles is 8 degrees. Since the sum of the exterior angles of any polygon is 360 degrees, there are 360 / 8 = 45 exterior angles and 45 sides.

A school psychologist wants to test the effectiveness of a new method of teaching Health. She recruits 600 fourth-grade students and randomly divides them into thw groups. Group 1 is taught by means of the new method, while Group 2 ls taught via traditional methods. The same teacher is assigned to teach both groups. Al the end of the year, an achievement test is administered and the results of the two groups compared ts What is the response variable in this experiment?O A. The score on the achievement test
O B. The students' ability in Health °
C.The score of Group 2 on the achievement test
O D. The score of Group 1 on the achievement test

Answers

Answer:

The correct answer is:

The score on the achievement test (A)

Step-by-step explanation:

Please note that the terms "response variable" can be used instead of "dependent variable", and the dependent variable is a variable whose  outcome is as a result of the change in the independent variable. It is the variable that the experimenter sets out to study in an experiment.

In this example, the score of the achievement test is a measure that tells of how effective the teaching method was on the selected group, and this is the dependent variable because it completely depends on the teaching method employed.

Please note that the dependent variable is another kind of variable and it is one that is completely under the control of the experimenter. In this case, the teaching method is the dependent variable.

Kremena's bank account earns 4.5% simple interest per year. How much must she deposit in the account today if she wants it to be worth $1,250 in 3 years? Round your answer to the nearest dollar.

Answers

Answer: $1101 must be deposited into the account.

Step-by-step explanation:

Let x represent the amount that must be deposited.

The formula for determining simple interest is expressed as

I = PRT/100

Where

I represents the interest after T years.

P represents the principal or initial amount deposited.

T represents the amount of time for which the money is left in the account in years.

R represents the interest rate.

From the information given,

P = $x

T = 3 years

R = 4.5%

I = 1250 - x

Therefore,

1250 - x = (x × 4.5 × 3)/100

1250 - x = 0.135x

x + 0.135x = 1250

1.135x = 1250

x = 1250/1.135

x = 1101 to the nearest dollar

Answer:

1095$ should be invested today .

Step-by-step explanation:

The formula of present value will be applied here :

Present Value= Future Value/(1+ interest rate)^Years

Present Value = 1250/(1.045)^3

PLEASE HELP ME WILL MARK YOU IF YOU HELP(please answer all of them >_<)

Answers

Answer:

See below.

Step-by-step explanation:

Problem 2.

Left figure: 2 sides and included angle: SAS

Middle figure: 2 angles and included side: ASA

Right figure: 3 sides: SSS

Problem 3.

CPCTC = corresponding parts of congruent triangles are congruent

A bookshelf is 3 feet long. Each book on the shelf is 3/4 inches wide. How many books will fit on the shelf? (Remember, there are 12 inches in a foot.)

Answers

Answer:

48

Step-by-step explanation:

3 feet is 36 inches. 3/4 of an inch is .75 inches. So you have a very simple equation of 36/.75=48
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