x+y = 47
x-y = 21
------------ add together
2x =68 divide by 2
x=34
x+y = 47
34+ y = 47
subtract 34 from each side
y = 13
the two numbers are 34 and 13
20 didn't do it for this one.
Answer:

Step-by-step explanation:
Given
The attached function
Required
The range of the function
A function is represented by matching an arrow from the domain to the range.
This implies that, the arrow comes from the domain to the range
From the attached function, the arrow points to 4,7 and 9
Hence, the range is:

The answer is C (brainly wont let me post an answer unless i make it this long)
3 steps per hour is way too slow
3 steps per second is way too fast
I would say it's 30 steps per minute (1 every 2 seconds) because it seems the most reasonable
30 steps per second is way too fast