Question

The first matrix shows the bridge toll (in dollars) for different types of vehicles. The second matrix shows the number of vehicles for which a toll was collected in each direction during a given time period.
http://prntscr.com/kny1bs

How much toll money was collected during this time period from southbound vehicles?

A. $3678.00

B. $4632.50

C. $5320.50

D. $5685.00

Answer 1

You've got:




Which [aesthetically] looks a bit crap; but that is a 1 X 3 matrix times a 3 X 2 matrix so you get a ..... 1 X 2 matrix

That's the big idea ... in terms of how we have agreed to multiply matrices

Hence:



The number-bashing was given to the internet, we get 2 answers, we just need to understand what they represent 🤭

Answer 2

I think the answer is D. $5685.00

Answer 3

That's the bloody N column :(

But I'll go with yer choice !

Answer 4

I don't want to go with the wrong answer; I'm not completely sure.

Answer 5

try C

better still, learn this stuff :)

Answer 6

Are you certain of your answer?

Answer 7

totally

Answer 8

So


Did you crash & burn?

Answer 9

Huh? I'm sorry I don't understand what you mean by that.

Answer 10

nvm

Answer 11

Thank you so much! Your answer was correct by the way.

Answer 12

mp

well done !!!