Speed (S) = Distance (D) / time (t)
First stretch
45 = D / 2
D = 45*2
D = 90 mp
How is the same distance:
Second stretch
S = 90 / t
Average speed (AS):
AS = (S1+S2) / 2
60 = [45+(90/t)] / 2
120 = 45+90/t
120-45 = 90/t
75 = 90/t
t = 90/75
t = 1,2 h
________________________
And now:
S = 90 / t
S = 90 / 1,2
S = 75 mph
Why didn’t you put the answer choices down below ?
Answer:
The distance formula is a formalisation of the Pythagorean Theorem using (x,y) . They are the same thing (but the distance formula is for working out the distance between two points and Pythagoras theorem is for working out the missing length in a right-angled triangle) in two different contexts.
Step-by-step explanation:
The answer is 10/14
How: 7 is half of 14 so 14 would be the denominator which is the bottom number. So what would 5 be half of? (think of 5+5) It's 10! So 10 would be the numerator which is on the top making the fraction 10/14.
Hope this Helps!
Answer:
The answer is 27
Step-by-step explanation:
You count how many lines it takes up and add them together