Emily778
Which choice describes the translation represented by the translation rule (x,y) -->(x+4, y-1)? (1 point)
4 units to the right and 1 unit down
1 unit to the right and 4 units down
4 units to the left and 1 unit up
4 units to the left and 1 unit down
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Emily778
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@johnweldon1993
Emily778
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@jim_thompson5910
jim_thompson5910
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x to x+4 means you're taking some x coordinate and turning it into x+4
jim_thompson5910
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visually, you're translating the point 4 units to the right
jim_thompson5910
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y to y-1 means what?
Emily778
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thanks. I already figured it out though. xP
jim_thompson5910
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ok great, glad you were able to figure it out
Emily778
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Can you help with this?
The hexagon GIKMPR and FJN are regular. The dashed line segments form 30° angles.
Find the angle of rotation about O that maps JK to FG.
90°
240°
150°
120°
jim_thompson5910
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one sec while I draw
Emily778
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K
jim_thompson5910
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how many angles have I highlighted?
Emily778
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5
jim_thompson5910
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each angle is 30 degrees, so the answer is 5*30 = 150
Emily778
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What about this one?
The hexagon GIKMPR and FJN are regular. The dashed line segments form 30° angles.
Find the angle of rotation about O that maps P to G. (1 point)
240°
120°
210°
270°
Emily778
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the picture is the same
Emily778
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@jim_thompson5910
jim_thompson5910
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ok drawing it out
jim_thompson5910
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how many angles did I mark below?
Emily778
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8
jim_thompson5910
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so 8*30 = 240 is your answer
Emily778
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why times 30?
Emily778
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and I really don't get this.
Find the degree of rotation about the spinner center that maps label i to label g.
(1 point)
72°
108°
36°
288°
jim_thompson5910
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because each angle I highlighted is 30 degrees
jim_thompson5910
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the other one, you're going 2 spots over
each angle is 36 degrees, so you're going a total of 2*36 = ??? degrees
Emily778
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72