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elizabethxoxo3271
16.10.2019 •
Mathematics
Determine which of the following transformations are linear transformations. a. the transformation tt defined by t(x1,x2,x3)=(x1,x2,−x3)t(x1,x2,x3)=(x1,x2,−x3) b. the transformation tt defined by t(x1,x2,x3)=(x1,0,x3)t(x1,x2,x3)=(x1,0,x3) c. the transformation tt defined by t(x1,x2,x3)=(1,x2,x3)t(x1,x2,x3)=(1,x2,x3) d. the transformation tt defined by t(x1,x2)=(2x1−3x2,x1+4,5x2)t(x1,x2)=(2x1−3x2,x1+4,5x2). e. the transformation tt defined by t(x1,x2)=(4x1−2x2,3|x2|)t(x1,x2)=(4x1−2x2,3|x2|).
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Ответ:
x = 12.
Step-by-step explanation:
This is a right angled triangle so you use the Pythagoras Theorem:
15^2 = 9^2 + x^2
x^2 = 15^2 - 9^2
x^2 = 225 - 81
x^2 = 144
x = √144
x = 12.