A track runner ran for 15 minutes, walked for 15 minutes, ran for another 20 minutes, and then stretched in place for 10 minutes
.Which graph describes the relationship between runner's total distance and time?
1 answer:
Note that:
When the track runner runs, he is expected to cover more distance than when walks
When he stretches his body, he is not expected to cover any distance because there is no motion when the body is stretched in place.
By carefully observing the graphs shown, the correct graph will be plotted in the format below:
Long distance for the first 15 minutes
Short distance for the second 15 minutes
Longer distance for the next 20 minutes
No distance covered in the last 10 minutes
Therefore, the only graph that describes the relationship between the runner's total distance and time is option B
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Answer:
Step-by-step explanation:
12a)To rationalize the denominator, multiply the denominator and numerator by √5.
b) (a+b)² = a² + 2ab + b²
(1 +√3)² = 1² + 2*1*√3 + (√3)²
= 1 + 2√3 + 3
= 4 + 2√3
a = 4 ; b =2
13) (a + b)(a - b) = a² - b²