After 3 hrs 20 mins.
The relative speed of the two cyclists is 15 - 12 = 3 mph.
Time; t = 10/3 = 3.33hr
Exact form = 23/2
Decimal= 11.5
Mixed number= 11 1/2
Remark
I do know why you are confused. It is hard to wrap one's head around something like this when you see it for the first time.
A
Because the graph is vertical, the x values are the same. x1 = x2
B
The segment can be represented as AB = |y2 - y1| You are not sure which is bigger. That is why you use the absolute value form.
C
AB = absolute(y1 - y2) The absolute value will make AB positive no matter which way it is written.
D
The answer to D is in parts B and C. You want AB to have a positive value no matter how y1 and y2 are chosen
E
No and the reason is found in D.
F
GH = abs(y2 - y1)
y2 = 2
y1 = - 32
GH = abs(2 - - 32) = (2 + 32) = 34
Or
GH = abs(-32 - 2) = abs(-34) = 34
We are given the length and width of a rectangle and we need to find perimeter- the distance around the shape
= 12.6 cm
w = 14.8 cm
The formula for the perimeter of a rectangle is
Perimeter = 2 + 2w
This makes sense because around the shape there are 2 equal lengths and 2 equal widths- one of the definitions of a rectangle
To find perimeter plug in the know vales of and w
Perimeter = 2(12.6 cm) + 2(14.8 cm)
Now use PEMDAS to solve
= 25.2 cm + 29.6 cm
= 54.8 cm
The perimeter of the rectangle is 54.8 cm
