Answer:
1. (x,y)→(y,-x)
2. (x,y)→(-y,x)
3. (x,y)→(-x,-y)
Step-by-step explanation:
1. Rotation 90° clockwise (or 270° counterclockwise) about the origin changes x into y and y into -x, so it has the rule
(x,y)→(y,-x)
2. Rotation 90° counterclockwise (or 270° clockwise) about the origin changes x into -y and y into x, so it has the rule
(x,y)→(-y,x)
3. Rotation 180° clockwise about the origin changes x into y and y into -x, so it has the rule
(x,y)→(-x,-y)
Here you can apply rotation by 90° clockwise twice, so
(x,y)→(-y,x)→(-x,-y)
Answer:
Step-by-step explanation:
Let the width of the rectangle = x
Length = 2x
Perimeter = 96 inches
2 * ( length + width) = 96
2 * ( 2x + x ) = 96
2 * 3x = 96
3x = 96/2 = 48
3x = 48
x = 48/3
x = 16 inches
Width = 16 inches
Length = 2*16 = 32 inches
Area = length*width
= 32*16
= 512 sq.cm
Let's look at the math; half a disk takes 40 seconds to rip, and two halves make a whole, so 40 + 40 = 80 and that's your answer
Answer:
Step-by-step explanation:
She received 80 votes
2/3x120=80
Answer:
a. what is the perimeter of a square with side length:
3 cm=12cm
7 cm=28
b.90
