Answer:
http://www.brainfuse.com/curriculumupload/1336403025157.html
Dilating a Polygon - Brainfuse
It can be applied by making it sound more educated
You'll reach destination in 1.6 days or rounded to 2 days.
->calculate how much did you pass already 1250×5/7=892 miles traveled (rounded)
->then calculate how much miles you have to go
1250-892=358 miles left to travel
->then calculate speed at which you travel
892/4(how much days you traveled already)=223miles per day
->then just divide miles left with speed
358/223=1.6 or 2 days left to reaching destination.
To find the x-intercept set y=0 and solve for x.
3x-7y=21
3x-7(0)=21
3x=21
x=7
so, x-intercept is at (7,0)
to find the y-intercept set x=0 and solve for y.
3x-7y=21
3(0)-7y=21
-7y=21
y=-3
so, y-intercept is at (0,3)