Answer:
614
Step-by-step explanation:
Let the number be x.
50% × x = 307
0.5x = 307
x = 307/0.5
x = 614
50% of 614 is 307.
James runs 1 mile every 2 min. How many miles does he run every 3 mins?
Answer:

Step-by-step explanation:


Answer:
5
Step-by-step explanation:
Answer: (4x+12) - (2x-5)
Step-by-step explanation: The (4x+12) is positive and the (2x-5) is negative.