Answer:
r=8
Step-by-step explanation:
45=6r-3
48=6r
r=8
Answer:
C. x > -1
Step-by-step explanation:
First you need to cancel out the -9 so you add 9 what you fo to one side you do to the other so -10+9 is -1 and you bring down the sign and you end up with x > -1
Answer:
Without a [roblem to go along with x=4, this would be underfined
Step-by-step explanation:
Answer:
B. 180° about the origin
Step-by-step explanation:
You are given a figure and its image, and asked to determine the angle of rotation. All of the answer choices indicate the center of rotation is the origin.
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You have two clues that the rotation is 180° about the origin:
- The original figure is in the 2nd quadrant, and the image is in the 4th quadrant, directly opposite the origin.
- Line ST is directed to the northeast; line S'T' is directed to the southwest, in exactly the opposite direction.
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To find the angle of rotation, you can look at the angle formed by a point, the center of rotation, and the image of the original point. Here, the angle UOU' is a straight angle, so the angle of rotation about O is 180°--the measure of that angle. (It can be convenient to use points close to the center of rotation, but any corresponding points on preimage and image will do.)
