Determine the level of measurement of the data set. (nominal, ordinal,

Can somebody help me with all three problems please

Lerok [7]

1. $x^{2} -10x +25 = 0$

These two numbers are: -5 and -5

-5 + (-5) = -10

-5 * -5 = 25

so...

(x - 5)(x - 5)

To find the roots set the factored numbers equal to zero and solve for x:

x - 5 = 0

x = 5

2. $x^{2} + 9x = -14$

This equation needs to be equal to zero, so bring -14 to the other side by adding 14 to both sides

$x^{2}+9x+14 =0$

Find two numbers that the sum is equal to 9 AND the multiplication of the numbers is 14

These numbers are 7 and 2

7 + 2 = 9

7*2 = 14

so...

(x + 2) (x + 7)

To find the roots set the each of the factored numbers equal to zero and solve for x:

x + 2 = 0

x = -2

x + 7 = 0

x = -7

3. $3x^{2} = 6x$

This equation needs to be equal to zero, so bring 6x to the other side by subtracting 6x to both sides

$3x^{2} -6x = 0$

In this equation you can factor out a 3 and an x:

3x (x - 2)

To find the roots set the each of the factored numbers equal to zero and solve for x:

3x = 0

3x/3 = 0/3

x = 0

x - 2 = 0

x = 2

Hope this helped!

8 0

4 years ago

Tickets to a play cost 8 dollars each write and expression that gives the ticket cost in dollars for a group of g girls and b bo

sladkih [1.3K]

Answer:

Step-by-step explanation:

8(B+G) OR 8B+8G

4 0

3 years ago

Buy stickers stickers what fraction of the schedule looking silver

Jlenok [28]

What is the question again

4 0

3 years ago

The size of a bicycle is determined by the diameter of the wheel. You want a 22-in bicycle for your birthday. What is the area o

Helga [31]

Area of a circle is pi*r^2.

Here the diameter is 22 inches, so the radius is 11 inches.

The area of the bike wheel is thus A = pi * (11 inches)^2 = 121*pi sq in

5 0

3 years ago

A poll solicits a large number of college undergraduates for information on the following variables: the name of their cell phon

Sidana [21]

Answer:

1)Nominal:-the name of their cell phone provider (AT&T, Verizon, and so on),

2)Ratio:- the numbers of minutes used last month (200, 400, for example),

3) Ordinal:- (Terrible, Adequate, Excellent, and so forth).

Step-by-step explanation:

The nominal level of measurement classifies data into mutually exclusive categories in which no order or ranking is imposed on the data set.

An example gathering information on college undergraduates base on the name of their cell phone provider (AT&T, Verizon, and so on).

The ratio level measures variables like time,weight, height, etc.

An example is the numbers of minutes used last month making phone calls by the college students. (200, 400, for example)

The ordinal level classifies data into categories that can be ranked (ordered)

Example ranking the satisfaction derived from the use of the service providers as (Terrible, Adequate, Excellent, and so forth).

7 0

3 years ago