7.5 km/h
Step-by-step explanation:
Let's assign the speed of Jerry in still air as <em>x </em> (in km/h)
Let's assign the speed of the wind as <em>y </em>(in km/h)
With the wind as Jerry’s back, he takes 10 minutes to get to the library. We can create the following equation. (<em>we are converting the minutes to hours by dividing by 60</em>);
2.5 / (x + y) = 10/60
10x + 10y = 150
x + y = 15
With the wind against Jerry, he takes 15 minutes from the library. We can create the following equation;
2.5 / (x-y) = 15/60
15x – 15y = 150
x – y = 10
We can now solve the simultaneous equation by subtraction;
x + y = 15
x – y = 10
2y = 5
y = 5/2 = 2.5
y = 2.5 km/h
x = 7.5 km/h
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Answer:
Step-by-step explanation:
Since a scalene, K would be 45. So 45+45+x=180
90+x=180
x=90
Answer:
The initial value of the function is 5
Step-by-step explanation:
we know that
The initial value of the function, is the value of the function when the value of x is equal to zero (the y-intercept)
In this problem
Observing the graph
The y-intercept is the point (05)
therefore
The value of the function for x equal to zero is 5
Answer:
(3•2^2x^7y^4)
Step-by-step explanation:
((3x2 • 4) • x5) • y4
