It should be 7.8 which is answer D
The equation of a line which has the slope m and passes through the point A(x1,y1) has the formula:
y-y1=m(x-x1)
in your case m= -5 ; A(x1;y1)=(1;-1)
y-(-1)= -5(x-1)
y+1= -5(x-1)
answer is c
Just add all 3 numbers up together:
6.45+ 0.15+0.5
=7.1
Since it was three days multiply the 7.1 by three
=7.1x3
=24
So for three days derrick rode for 24 km
Hoped I helped :)
Answer: the first one is 3y
Step-by-step explanation:
Go to the website mathpapa , type in the problem and it gives you the answer with steps
