To solve for the time it takes to travel a certain distance at a certain speed, use the formula,
time = distance / speed
Given that the entire journey takes four hours, add up the time it takes David to row upstream with that of him travelling downstream. This is mathematically represented as,
total time = time upstream + time downstream
4 = 3/(x - 1) + 3/(x +1)
Solving for x in the equation gives 2. Thus, David's speed in still water is 2 miles per hour.
-11 is your answer. To get this, you should follow 'PEMDAS' which stands for P-parenthesis, E-exponents, M-multiplication, D-division, A-addition, S-subtraction. Which ever comes first, is how you solve your problem. Therefore, in your case, add the positives first, then subtract. Hope this helped!
140 because 10 * 14 is 140
Answer: 170
Steps:
Range- the difference between the greatest and smallest value of a data set.
546 - 376 = 170
Answer:
Step-by-step explanation:
1