Please need help I will be MARKING as BRIANILIST. thank you so much.

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Step-by-step explanation:

INCORRECT A. City P and City Q are above sea level

because City Q is not above sea level, rather is on the 0

INCORRECT B. City Q and City R are below sea level

because, again, City Q is not below sea level either

INCORRECT C. City P is above sea level and City Q is below sea level

because AGAIN City Q is in the middle and not below or above

CORRECT D. City P is above sea level (because it is above the zero) and City R is below sea level (because it is below the zero)

Hope this helped and have a good one :)

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 !