-10 represents 10 seconds before a runner finishes his first lap. 10 represents 10 seconds after the runner
finishes his first lap.
What does zero represent in this situation?
A. The time it takes the runner to complete the lap
B. The speed of the runner after he finishes his first lap
C. The time when the runner finishes his first lap
o
D. The speed of the runner before he finishes his first lap

yes

step-by-step explanation:

yes

answer: the answer is b. i think hope i got it correct

step-by-step explanation:

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !