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.
Answer: A) Corresponding Angles
Refer to the diagram below.
Two angles are corresponding to each other when they are on the same line that crosses two parallel lines, one angle is inside the parallel lines, the other is on the outside.
Answer:
(this might be wrong but if your desperate) 518
Step-by-step explanation:
1. 70+52=122
2. 640-122= 518
Answer:
Step-by-step explanation:
Jennifer has 7 marbles in her bag consisting of 4 blue, 1 white, 1 pink, and 1 yellow.
The probability of her picking a blue marble is gotten by dividing the number of blue marbles that she has by the total number of marbles.
Therefore, the probability of picking a blue marble is: