A 90 degree counter-clockwise rotation is being done on the black figure to get the red figure.
The algebraic rule for a 90 degree counter-clockwise rotation is ![(x,y) \to (-y,x)](https://tex.z-dn.net/?f=%28x%2Cy%29%20%5Cto%20%28-y%2Cx%29)
For instance, the point C = (0,1) moves to C' = (-1,0), which is shown in the graph given and also you can use the rule above to get the same coordinates. The other points A,B and D follow the same rule.
Side note: the rotation is centered at the origin (0,0). This point is fixed.
Absolute value takes the distance of the number, not the direction. That means that the absolute value of a number would always be a positive.
|9| = 9
Answer: 9
D=y2-y1
D+y1= y2-y1+y1 add y1 to both sides to cancel it out.
D+y1=y2 that drops -y1 for the right side but the left remains.
And that's your answer.
Answer:
what do you need help with ???
Answer:
Each tulip costs $2.17 at Store B.
Step-by-step explanation:
Store B = 6 for $13.
Find unit price.
13 / 6 = 2.16666666...