9514 1404 393
Answer:
- boat: 48 km/h
- current: 14 km/h
Step-by-step explanation:
The upstream speed is ...
u = (204 km)/(6 h) = 34 km/h
The downstream speed is ...
d = (372 km)/(6 h) = 62 km/h
The speed of the boat in still water is the average of these values:
b = (34 kph +62 kph)/2 = 48 kph
The speed of the water is the difference between the boat's speed and the speed made good:
w = 48 -34 = 14 . . . km/h
The rate of the boat in still water is 48 km/h. The rate of the current is 14 km/h.
The answer to the question
Answer:
The 6 Lego kits can be selected from the 9 available Lego kits in 84 ways.
Step-by-step explanation:
Use combinations to solve this problem.
Combination is defined as the selection of <em>r</em> elements from <em>n</em> distinct objects irrespective of the order. The objects cannot be replaced.
There are 9 Lego kits available.
And the total number of children is 6.
That is, we need to select 6 Lego kits from the 9 available Lego kits.
6 Lego kits can be selected from the 9 available Lego kits in 
ways.
Solving the combination as follows:
Thus, there are 84 ways to select 6 Lego kits from 9 available Lego kits.
Answer:
-3x - 7 is the furthest it can be simplified
For example a × b × c = c × a × b
Answer:
Therefore the Commutative Expression is,
11 × w × 3 = 11 × 3 × w
Step-by-step explanation:
Commutative property:
The Commutative property states that order does not matter.
This property allows Two or more factors to be multiplied in any order without Changing the product.
Multiplication and addition are commutative.
For example a × b = b × a
1. 2 × 5 = 5 × 2
Therefore the Commutative Expression is,
11 × w × 3 = 11 × 3 × w
