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Mathematics 70 Online
trueangel12312:

The vertices of a rectangle are R(–5, –5), S(–1, –5), T(–1, 1), and U(–5, 1). After translation, R′ is the point (0, 2). Find the translation rule and coordinates of U ′. a. (x, y) → (x − 5, y − 7); (−10, − 6) b. (x, y) → (x + 5, y − 7); (0, − 6) c. (x, y) → (x − 5, y + 7); (−10, 8) d. (x, y) → (x + 5, y + 7); (0, 8)

trueangel12312:

@AMQ

trueangel12312:

Please explain

AMQ:

Think about it. What needed to be done to make -5 turn to 0?

trueangel12312:

Subtraction..

AMQ:

actually, we would have to add 5 to it, because -5 + 5 = 0. get it?

trueangel12312:

Yes

AMQ:

so what needed to be done to -5 to get 2?

trueangel12312:

-3 - -5

AMQ:

errrr... well, the simpler way would be to add 7 to -5, which would give us 2. So since we added 5 to x, and 7 to y, which is the only choice that can be correct?

trueangel12312:

D

AMQ:

yup

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