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Verdich [7]
3 years ago
15

If a= (4,-5) and b= (7,-9), what is the length of ab

Mathematics
2 answers:
Neko [114]3 years ago
8 0
The answer is 5 units.

faust18 [17]3 years ago
5 0
<span>A (4,-5)
B (7,-9)

</span>AB= \sqrt{(x_A-x_B)^2+(y_A-y_B)^2} \\  x_A=4; \ \ x_B=7; \ \ y_A=-5; \ \ y_B=-9; \\  \\ AB= \sqrt{(4-7)^2+(-5-(-9))^2}= \sqrt{(-3)^2+4^2} =   \sqrt{25}=5<span>
</span>
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3 years ago
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