Answer:
19
Step-by-step explanation:
40-21+19
20 miles/2 hours = 10 miles/1 hour, therefore her average speed is 10mph
Answer:
The bottom one: The value is the difference of 42 and the sum of 20 and 3.
Step-by-step explanation:
The answer is what you get when you subtract 23 from 42. Using "the difference" means subtraction is involved and you expression is 42 - (minus) (20+3).
45 is exactly half of 90
that means 45 is 50% of 90.
