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ariana0517
19.04.2021 •
Mathematics
A train travels 18 km in 30 minutes.Find the speed of the train in km/h
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Ответ:
Step-by-step explanation:
s=d/t
s=18/30
s=3/5km/h
Ответ:
Step-by-step explanation:
Use the 2 points for which you have both an x and y coordinate to write the equation of the line containing those 2 points. When you get the equation, sub in the x value of 6 and solve for y.
Begin by finding the slope of the line:
Then use one of the points in point slope form to write the equation in slope-intercept form. I used (0, -5). But either point you choose will give you the exact same line...promise.
y - (-5) = 2(x - 0) and
y + 5 = 2x and
y = 2x - 5
Now sub in the x value of 6 for x and solve for y:
y = 2(6) - 5 and
y = 12 - 5 so
y = 7