Answer:
36 mph
Step-by-step explanation:
The appropriate relations are ...
time = distance/speed
speed = distance/time
Suppose the race has a total length of 360 miles. Then half the race is 180 miles.
The cyclist's time on the first half is (180 mi)/(30 mi/h) = 6 h.
The cyclist's time on the second half is (180 mi)/(45 mi/h) = 4 h.
The total time is 10 h for the total distance of 360 mi, so the average speed is ...
(360 mi)/(10 h) = 36 mi/h
_____
The length of the race doesn't matter. The above numbers make the math convenient. The average is computed from ...
1/((1/2)/30 + (1/2)/45) = 2/(1/30 +1/45) = 2·30·45/(30+45) = 36
This is the <em>harmonic mean</em> of the numbers 30 and 45.
An inequality where the difference between 2 and a number is at least negative 1 will be x - 2 ≥ -1.
<h3>What is the inequality?</h3>
The first part of the inequality is that there is a difference between a number and 2.
Assuming that number is 2, the first part is:
x - 2
The result of this subtraction at least negative 1. When a number is at least a number, it means that it is either that number or larger.
So the total inequality is:
x - 2 ≥ -1
Find out more on inequalities at brainly.com/question/16914953.
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The answer will be 6118.4
Answer: 195
Step-by-step explanation: 5*13*6=390
390/2=195
Its also 34 ....hope u got ur answer
