Answer:
y = -(5/2)x -2
Explanation:
The general formula for a straight line is y – mx + b.
The image below shows the graph of the line.
Step 1. <em>Calculate the slope</em>.
Slope = m = Δy/Δx = (y₂-y₁)/(x₂-x₁)
x₁ = 0; y₁ = -2
x₂ = -2; y₂ = 3 Calculate m
m = [3-(-2)]/(-2-0)
m = (3+2)/(-2)
m = 5/(-2)
m = -5/2
Step 2. <em>Calculate the y-intercept
</em>
When x = 0, y = 2.
The y-intercept (b) is at y = -2
Step 3. <em>Write the equation </em>for the graph
y = mx + b
y = -(5/2)x - 2
Let s and c be the rate of the boat in still water and the rate of the current, respectively. Then:
108/s-c=3
108/s+c=2
3s-3c=108
2s+2c=108
Solve for s and c
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Answer:
![\frac{40}{100}](https://tex.z-dn.net/?f=%5Cfrac%7B40%7D%7B100%7D)
Step-by-step explanation:
You can multiply on the upper and bottom part by the same number without changing the fraction so ![\frac{4}{10}=\frac{4\cdot 10}{10\cdot 10}=\frac{40}{100}](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B10%7D%3D%5Cfrac%7B4%5Ccdot%2010%7D%7B10%5Ccdot%2010%7D%3D%5Cfrac%7B40%7D%7B100%7D)