Matrix :
1 4 4
5 2 2
1 5 5
=> Determinant =
1 * (2*5 - 2*5) - 4 * (5*5 - 1*2) + 4 * ( 5*5 - 2*1)
= 1*(10 - 10) - 4*(25 - 2) + 4*(25 -2) = 1*0 + 4* 23 + 4*(25 - 2) = 0 - 4*23 + 4*23 = 0
Answer: 0
Yes every integer is a rational number because they can be expressed in the form p/q.
8x - 88 = 2x - 34
6x = 54
x = 9
Answer:
Step-by-step explanation:
Remark
I hope you don't mind if I laughed a little at the graph. The y intercept of the line is at 10 dollars, but the rental car has not moved an inch. I guess they're charging you to look at your driver's license. It's late, and maybe I am a little giddy.
Begin by using a ruler (or some other straight edge) to join all the dots.
a) I'll spend a little time here. It is very important that you know how to read a chart and this question is your first step. The question is how many dollars does it take to go 40 miles? There is a system. Start with the 40 miles on the horizontal axis (x axis if you know that that is).
Use a ruler to go straight up until you hit the line.
- When you hit the line, mark the place.
- Now move straight across until you hit the y axis where you find out the money.
- You should get 30 dollars.
b) This question is a guess.
- You can find the 70 dollars easily enough. Go straight up again until you hit the line.
- Mark the point on the line.
- Go straight across again.
- Not so easy. It isn't marked. You have to make a guess. My guess is 45. What do you think?
c) This question is the exact reverse of the other two.
- This time you start with the amount of money
- So you start at 60 dollars and go straight across until you hit the line.
- Mark the point.
- Now take your ruler and go straight down.
- You should hit 100 miles.
Answer:
Part a) In Geneva the watch is cheaper
Part b) The watch in Geneva is 
cheaper than the same watch in Manchester
Step-by-step explanation:
<u><em>The question is</em></u>
a) In which city is the watch cheaper?
b) By how much is it cheaper (in £)?
Part a)
Transform 
in order to work with the same currency and make the comparison
If 
Now we can make the comparisons:
In Geneva the watch costs
and
in Manchester it costs
therefore
In Geneva the watch is cheaper
Part b)
If we want to know by how much is cheaper, subtract from the expensive price the value of the cheaper price
Therefore
The watch in Geneva is cheaper than the same watch in Manchester
