The distributive property: a(b - c) = ab - ac
27 - 18r = 9·3 - 9·2r = 9(3 - 2r)
9514 1404 393
Answer:
- boat: 72 km/h
- current: 16 km/h
Step-by-step explanation:
The speed difference between boat and current is the upstream rate:
(448 km)/(8 h) = 56 km/h
The sum of speeds of boat and current is the downstream rate:
(440 km)/(5 h) = 88 km/h
The rate of the boat is half the sum of these:
(56 +88)/2 = 72 . . . km/h
The rate of the current is half their difference:
(88 -56)/2 = 16 . . . km/h
The rate of the boat is 72 km/h; the rate of the current is 16 km/h.
For this case we have that the relationship is inverse.
Therefore, we have a function of the form:
We must find the value of k.
For this, we use any ordered pair, such as:
Substituting values:
Clearing k we have:
Then, the function is:
Answer:
The relationship between the variables in this table is an inverse variation.
A function to model is:
Answer:
D = 13 units
Step-by-step explanation:
<u><em>Using Distance Formula to find the length.</em></u>
Distance Formula =
D =
D =
D =
D =
D = 13 units
Answer:
Step-by-step explanation:
1/3, 1/5 of