Answer:

Step-by-step explanation:
Given


Required
Determine AC
Since A, B and C are collinear, then:

So, we have:

3-1 finds for she did to is to is to to fix l Fick
Answer:
x=6,y= 7
Step-by-step explanation:
-6x +7y= 13
-6x+8y=20
-y = -7
divide through by -1
y =7
sub y= 7 in equation 1
then x= 6
First we write it into scientific notation which is 3.5*10^7. now it's order of magnitude is power of 10 that is 7. So order is 7.