C) y = -2x + 3
When x is 0, the y value is where it's going to cross the x-axis. To find the slope: To get from 3 to 1, you subtract 2 so -2 is your y. Then 0 to 1, you add one. And it's y over x so your slope will be -2/1 which is -2
Answer: The wingspan is 36 m.
Using a proportion to solve this, we write the scale factor as a ratio first: 19/38, since 19 is the size of the model's length and 38 is the real length. For the second ratio, we have 18 for the size of the model wingspan and x for the real wingspan:
19/38 = 18/x
Cross multiply:
19*x = 38*18
19x = 684
Answer:
100 miles per 5 hour
Step-by-step explanation:
by the average speed of 20 miles per hour
it takes 5 hour average to cover 100 miles
Answer:
1 solution
Step-by-step explanation:
See attachment for the graph of the cosine function f(x) = 5 cos(π/2x) - 1
<h3>How to graph the cosine function?</h3>
From the question, the given parameters are:
Amplitude, A = 5
Vertical shift, D = -1
Period, T = 4
A cosine function is represented as:
f(x) = A cos(B(x + C)) + D
Where
Amplitude = A
Period = T
Horizontal shift = C
Vertical shift = D
Since the horizontal shift is not stated in the question, we can assume that the horizontal shift is 0
i.e. C = 0
So, the equation of the cosine function becomes
f(x) = A cos(Bx) + D
Calculate the value of B using
B = 2π/T
So, we have:
B = 2π/4
Evaluate
B = π/2
So, we have:
f(x) = A cos(π/2x) + D
Substitute the known values of A and D in the above equation
f(x) = 5 cos(π/2x) - 1
Next, we plot the graph of the cosine function on a graphing tool
See attachment for the graph of the cosine function f(x) = 5 cos(π/2x) - 1
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