kathleensumter4913
01.12.2020 •
Mathematics
Can I have the answers to questions 6, 7, and 8?
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Ответ:
Es freut mich, dich kennenzulernen.
Ответ:
See the diagram below. A drawing is optional, but it might help visualize what is going on. Draw out a line segment with A and D at the two endpoints. Place B and C anywhere you want on the line. Don't worry about being accurate with the drawing. All that matters is the basic idea. All four points are on the same line because we are told that the points are collinear.
The entire line segment AD is 30 units long. AB = 11 is the first little piece and BC = 12 is the next piece. The last piece CD is unknown, so we'll call it x. The three small pieces (AB, BC and CD) must add back up to the overall line segment AD
So,
AB+BC+CD = AD
11+12+x = 30
23+x = 30
x = 30-23
x = 7
CD is 7 units long.