we are given
a number is 429
where 4 is underlined
For finding value of digits , we always start from right side
Firstly , it comes unit digit
multiply by 1
Secondly , it comes tenth digit
multiply by 10
Thirdly , it comes hundredth digit
multiply by 100
we can see that 4 is third digit from right
so, it will at hundredth place
To find it's value, we multiply by 100
so, we get
.............Answer
So F(m) because F dollars for every mph over the speed limit
so 40 dollar speeding fine so +40
10 dollars for every mile over and m=miles over so put them all toghether and get
F(m)=10m+40
1.
so if you were going 78 mph
to find the mph over you would do 78-70=8mph over so put in 8 for m and get
F(8)=10(8)+40=80+40=$120 fine for going at 78 mph
Hi, hope this helps :)
Feel free to ask me if you do not understand. I used the elimination method.
F (x)=y
y=2x-9
X Y
-2 -15 y=2 (-2)-9
y=-4+-9
y=-15
-1 -11 y=2 (-1)-9
y=-2+-9
y=-11
0 -9 y=2 (0)-9
y=0+-9
y=-9
1 -7 y=2 (1)-9
y=2+-9
y=-1
2 -5 y=2 (2)-9
y=4+-9
y=-5
Here is all the work
