Move everything around. d+1.6=9.7. d=8.1.
10c-15+3-8c-6+5c
7c-18 i think so
To get the coordinates of C we shall proceed as follows:
AB:BC=1:4
B-A=[(-3--7),(-5--8)]=(4,3)
4(4,3)=(16,12)
thus the coordinates of C will be:
(16-3,-5+12)
=(13,7)
When a straight line is given the form:

m is the gradient. It shows how the value of y changes for an increase of x by 1.
So, in this case, the gradient is
4
i do not have the answer but i have a website that will help you, its called symbolab and it will change ur life