Prove: slope of × slope of = -1
statements reasons
1.
is similar to given
2. property of similar triangles
3. slope of
slope of definition of slope
4. slope of slope of multiplying the slopes
5. substitution property of equality
6. slope of slope of = -1
simplifying the right side
the table shows the proof of the relationship between the slopes of two perpendicular lines. what is the missing statement in step 5?

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

Which of the following statements is a true conclusion that can be made from the scaled bargraph?