MATHEMATICS HIGH SCHOOL

Find mean of the following data.
X 5 10 15 20
F 3 6 3 4
25
4

Answers

Answer 1

Answer:

Answer:

14.1

Step-by-step explanation:

Mean = sum of the items/ no. of items = ∑fx÷∑f = 705÷ 50 = 14.1

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2+5*___=33
Figure out the blank.

You can use exponents

Answers

Answer:

6.2

Step-by-step explanation:

2+5*x=33

5*x=33-2

5*x=31

X=31/5

X=6.2

6.2 should be the answer

6x - 5y= 70
7x + 2y=66

I need a answer in words step by step please help!!

Answers

Answer:

x = 10

y = -2

Step-by-step explanation:

Elimination method:

6x - 5y = 70 -----------------(I)

7x + 2y = 66 -----------------(II)

Multiply equation (I) by 2 and equation (II) by 5 and add. So, y will be eliminated and you can now find the value of x

(I)*2 12x - 10y = 140

(II)*5 35x + 10y = 330 {Now add}

47x = 470

x = 470/47

x = 10

Plugin x = 10 in equation (II)

7*10 + 2y = 66

70 + 2y = 66

Subtract 70 from both sides

2y = 66 - 70

2y = -4

Divide both sides by 2

y = -4/2

y = - 2

(10,-2) or x=10 , y=-2

What is the best classification for -4

Answers

The best classification for the number -4 is an integer.

What is a number?

A number is a basic component of mathematics. A number is an arithmetic value which is used to represent the quantity of an object. Numbers are used for counting, measuring, keeping things in order, indexing, etc.

For the given situation,

The number is -4.

We have different types of numbers based on their properties such as natural numbers, whole numbers, rational and irrational numbers, integers, real numbers, complex numbers, even and odd numbers, etc.

Based on the properties of numbers, -4 can be classified as an integer or a real number or a rational number or a negative number or even number.

Among these the best classification for -4 is an integer.

Hence we can conclude that the best classification for the number -4 is an integer.

Learn more about numbers here

brainly.com/question/1874897

#SPJ2

rational number, integer, negative number

Identify the independent and dependent variables. The number of campers decreased, so fewer counselors are needed.

A.
The independent variable is number of counselors and the dependant variable is number of campers.

B.
The independent variable is number of campers and the dependant variable is number of counselors.

Answers

The numbers of campus decreased can't be controlled by other people so it's independent.

Therefore, your answer is B. The independent variable is number of campers and the dependent variable is number of counselors.

One month Tammy rented 3
movies and
2
video games for a total of
$20
. The next month she rented
8
movies and
4
video games for a total of
$45
. Find the rental cost for each movie and each video game.

Answers

$3x + 2y = 20$
$8x + 4y = 45$
$where x = # of movies$ and $y = # of video games$

In order to solve this systems of equations problem, you need to use the elimination method.

You can multiply the top equation, $3x + 2y = 20$ , by -2 in order to eliminate the $y$ values.

$(3x + 2y = 20) *-2$ will turn into $-6x - 4y = -40$

From there, we can eliminate.

$-6x - 4y = -40$
$8x + 4y = 45$

Since $4y$ and $-4y$ are opposites in sign and equal in coefficients, we can remove them from our equations and add the rest of the terms together.

$-6x - 4y = -40$
$8x + 4y = 45$
will turn into -->
$2x = 5$

So, x = $(5)/(2)$ , which means 1 movie costs $2.50. Then, we can solve for the video game price, $y$ , by substituting our x back into one of the equations.

$3x + 2y = 20$
$3*<span>(5)/(2) </span>+ 2y = 20$
$y = (25)/(4)$

Each movie costs $2.50 and each video game costs $6.25.

Help me on this math pls!!!!!!!!!!!!!!!!!!!!!!!