Ask question

Ask question

All categories

3 years ago

7

Which expression represents 7 less than the product of 11 and 4 .

1 answer:

ryzh [129]3 years ago

3 0

The answer is (4x11)-7 i believe

You might be interested in

The hourly earnings (in dollars) for a sample of 25 railroad equipment manufacturers are:15.60 18.7514.60 15.8014.3513.90 17.501

taurus [48]

Answer:

$Median = 15.80$

$Mode = 15.20\ \&\ 15.25$

$IQR = 2.35$

Step-by-step explanation:

Given

$15.60,\ 18.75,\ 14.60,\ 15.80,\ 14.35,$

$13.90,\ 17.50,\ 17.55,\ 13.80,\ 14.20,$

$19.05,\ 15.35,\ 15.20,\ 19.45,\ 15.95,$

$16.50,\ 16.30,\ 15.25,\ 15.05,\ 19.10,$

$15.20,\ 16.22,\ 17.75,\ 18.40,\ 15.25.$

Solving (a): The median and the mode

First, we sort the data.

$13.80,\ 13.90,\ 14.20,\ 14.35,\ 14.60,\ 15.05,\ 15.20,\ 15.20,\ 15.25,\ 15.25,$

$15.35,\ 15.60,\ 15.80,\ 15.95,\ 16.22,\ 16.30,\ 16.50,\ 17.50,\ 17.55,\ 17.75,$

$18.40,\ 18.75,\ 19.05,\ 19.10,\ 19.45.$

The median position is:

$Median = \frac{n + 1}{2}th$

$Median = \frac{25 + 1}{2}$

$Median = \frac{26}{2}$

$Median = 13th$

The 13th item is: 15.80

Hence:

$Median = 15.80$

The modes are:

$Mode = 15.20\ \&\ 15.25$ --- they both have frequency of 2 while others occur once

Solving (b): The interquartile range

This is calculated as:

$IQR = Q_3 - Q_1$

Since the median is at the 13th position, Q1 is:

$Q_1 = \frac{1 + 13}{2}th$

$Q_1 = \frac{14}{2}th$

$Q_1 = 7th$

The 7th item is: 15.20

$Q_1 = 15.20$

Similarly, Q3 is:

$Q_3 = \frac{13+n}{2}$

$Q_3 = \frac{13+25}{2}$

$Q_3 = \frac{38}{2}$

$Q_3 = 19th$

The 7th item is: 17.55

So:

$Q_3 = 17.55$

Hence,

$IQR = 17.55 - 15.20$

$IQR = 2.35$

5 0

3 years ago

The side lengths 9, 13, and 17 form a triangle.. True. False

ozzi

Answer:

false

Step-by-step explanation:

6 0

3 years ago

Find the length of side xx in simplest radical form with a rational denominator.

anygoal [31]

Answer:

$x = \frac{3}{ \sqrt{2} }$

Step-by-step explanation:

${x}^{2} + {x}^{2} = {3}^{2} \\ 2 {x}^{2} = 9 \\ {x}^{2} = \frac{9}{2} \\ x = \frac{3}{ \sqrt{2} } \\ x = 2.121$

8 0

2 years ago

A roller coaster has 10 cars. Seven of the cars are green. Write two equivalent fractions for the part of the cars the green.

Nataliya [291]

7/10 and 14/20 are the equivalent fractions that would solve this equation

6 0

3 years ago

Read 2 more answers

Mara had 7 cookies.She ate some Now she has 4 cookies. How many cookies did she eat? Draw a tape diagram

Westkost [7]

Mara ate 3 cookies because you subtract

3 0

3 years ago

Read 2 more answers