Answer:
171
Step-by-step explanation:
9 * 19 is 171 dollars so that's what he'll owe
Answer:
In mathematics, a coefficient is a multiplicative factor in some term of a polynomial, a series, or any expression; it is usually a number, but may be any expression.
Step-by-step explanation:
Answer and Explanation:
A function is said to be increasing, if the derivative of function is f’(x) > 0 on each point. A function is said to be decreasing if f”(x) < 0.
Let y = v (z) be differentiable on the interval (a, b). If two points z1 and z2 belongs to the interval (a, b) such that z1 < z2, then v (z1) ≤ v (z2), the function is increasing in this interval.
Similarly, the function y = v(z) is said to be decreasing, when it is differentiable on the interval (a , b).
Two points z1 and z2 Є (a, b) such that z1 > z2, then v (z1) ≥ v(z2). The function is decreasing on this interval.
The function y = v (z)
The derivative of function Y’ = v’(z) is positive, then the function is increasing.
The function y = v (z)
The derivative of function y’ is negative, then the function is decreasing.
Answer:
Speed of boat in still water = 40 mph
Rate of current = 10 mph
Step-by-step explanation:
Let the speed of boat in still water be x & let the speed of the stream be y.
Total Distance = 150 miles
Time taken to travel during upstream = 5 hrs
Speed of the boat during upstream = 
Speed of boat during upstream can be represented as 
because the boat is moving in the opposite direction of flow of stream.
Time taken to travel during downstream = 3 hrs
Speed of boat during downstream = 
Speed of boat during downstream can be represented as 
because the boat is moving in the same direction of flow of stream.
We got a pair of linear eqns. Let 
be eqn.1 and be eqn.2 . Using substitution method ,
From eqn.1 ,
Putting 'x' in eqn.2 , 
Putting y in eqn.1 ,
Hence , the speed of boat in still water is 40 mph and speed of stream is 10 mph
They are able to coexist because they eat different things. The parrot eats the big seeds, while the parakeet eats the small ones. There is enough food for both of them because they eat different things.
