Question

3. The matrices show the enrollment of boys and girls on the basketball, lacrosse, and soccer teams in two towns.

Town A Town B
Boys Girls Boys Girls
Basketball[84 76] Basketball [94 70]
Lacrosse [72 88] Lacrosse [88 89]
Soccer [96 100] Soccer [100 110]

A. If we let matrix A be the matrix for Town A, what is the element a21, and what does it represent?
B. If we let matrix B be the matrix for Town B, what is the address of the element that represents the number of girls enrolled in soccer in Town B?
C. What is the matrix that results when you subtract matrix A from matrix B?
D. Name the matrix you found in Part C matrix C. What is element c12, and what information does it tell you about the number of girls enrolled in basketball in Town B compared with Town A?
E. What is the matrix that shows the enrollment in Town A after a 25% increase in enrollment in all sports and in both genders? (Hint: Find 1.25A.)

Answer 1

your hot ill help

Answer 2

@niccco_

Answer 3

@Smartypants123 thanks

Answer 4

how old are you

Answer 5

scram k12dude shes my hotty question

Answer 6

@niccco_

Answer 7

i think a

Answer 8

@Smartypants123 I just need some help solving this question

Answer 9

do you have a boyf

Answer 10

oh ok sorry

Answer 11

@Smartypants123 I don't see what my age and relationship status has to do with my math question

Answer 12

sorry

Answer 13

now i think its c

Answer 14

but stiil do you have a boyf

Answer 15

you think what is C? @Smartypants123

Answer 16

the solution

Answer 17

@niccco Did you do part B yet (mean)?

Answer 18

@mathmate not yet. I'm still trying to get the rest figured out first :/

Answer 19

@abhilash11

Answer 20

Yeah @niccco_. See the adress of an element in a matrix is given by , say for eg a21. Here the first no. ie 2 is the row no. and the 2nd no ie 1 is the column no.

Answer 21

So, the element found on the intersection of these two, is the required answer

Answer 22

Now, Q1. a21 right? so go to town A. See the 2nd row? Laccrose I suppose and the first column ie Boys. See the intersection? The element is 72 and it represents the no. of boys (column) playing lacrosse (row)

Answer 23

B. See there are three rows and two columns in the first place.

Answer 24

column 1 refers to boys and column 2 to girls
row 1 to Basketball
row 2 to Lacrosee
row 3 to Soccer
So now the question says address of the element of girls in soccer.
So we go vertically down the girls group (column) and we go horizontally towards the right of the soccer row.
The intersection will give us the element.

Answer 25

Hint:
For any matrix X, \(x_{mn}\) refers to the element of the \(m^{th}\) row and \(n^{th}\) column.
See example below.

Answer 26

I JUST saw this! Sorry for the super late reply so first row second column?? @mathmate @Abhilash11

Answer 27

Recall: \(a_{mn}\) refers to \(m^{th}\) row and \(n^{th}\) column.

Answer 28

mth row and nth column :| what is that? i'm sorry! I am really not good at math especially graphing @mathmate