Answer:
A. D=sqrt( (x2-x1)^2+(y2-y1)^2 )
Step-by-step explanation:
The distance between two points is the root of the sum of the squares of the differences in their corresponding coordinates. The equation of choice A is the usual formulation.
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<em>Comment on answer choices</em>
Because the square of a number is the same as the square of its opposite, the formula in choice D is also correct.
This differs on what number you want to talk about. 1 is the hundreds, 8 is the tenths, 7 is the ones.
Answer: the number of yards rushed by one player is 310 while the number of yards rushed by the second player 1240
Step-by-step explanation:
Let x represent the number of yards rushed by one player.
Let y represent the number of yards rushed by the second(faster) player.
Last season 2 running backs on the Steelers football team rushed for a combined total of 1550 yards. This means that
x + y = 1550 - - - - - -- - -- - - - - - 1
One rushed 4 times as many as the other. This means that
y = 4x
Substituting y = 4x into equation 1, it becomes
x + 4x = 1550
5x = 1550
x = 1550/5
x = 310
y = 4x = 4 × 310
y = 1240
