A mermaid is swimming at sea level when a human comes by. She dives underwater at a rate of 3 meters per second. She continues to descend for 21 seconds. What integer represents her position?

63 metres

Step-by-step explanation:

Distance covered in 1 second = 3 m

Time taken =21 sec

Her position = 3 x 21 m = 63 metres

for the points

step-by-step explanation:

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this