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3 years ago

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If Angle 8 is congruent to angle 10 and Angle 1 is congruent to angle 7, which describes all the lines that must be parallel? Li

nes r and s are crossed by lines t and u to form 16 angles. Clockwise from top left, at the intersection of r and t, the angles are 1, 2, 3, 4; at the intersection of s and t, 5, 6, 7, 8; at the intersection of u and s, 9, 10, 11, 12; at the intersection of u and r, 13, 14, 15, 16.
A. Only lines r and s must be parallel.

B. Only lines t and u must be parallel.

C. Lines r and s and lines t and u must be parallel.

D. Neither lines r and s nor lines t and u must be parallel.

2 answers:

NISA [10]3 years ago

4 0

Answer:

C

Step-by-step explanation:

Since they are crossing with each other they're not necessarily parallel with everything but instead themselves.

Mars2501 [29]3 years ago

4 0

Answer:

C

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

(n - 4)(3n + 7)

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faust18 [17]

Answer:

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Step-by-step explanation:

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Instructions: Use the ratio of a 30-60-90 triangle to solve for the variables. Leave your answers as radicals in simplest form.

wel

Answer:

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Step-by-step explanation:

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3 years ago

Two trains leave a town at the same time heading in opposite directions. One train is traveling 12 mph faster than the

klemol [59]

Answer:

I'm going to paint you a picture in words of what this looks like on paper. We have a train leaving from a point on your paper heading straight west. We have another train leaving from the same point on your paper heading straight east. This is the "opposite directions" that your problem gives you.

Now let's make a table:

distance = rate * time

Train 1

Train 2

We will fill in this table from the info in the problem then refer back to our drawing. It says that one train is traveling 12 mph faster than the other train. We don't know how fast "the other train" is going, so let's call that rate r. If the first train is travelin 12 mph faster, that rate is r + 12. Let's put that into the table

distance = rate * time

Train 1 r

Train 2 (r + 12)

Then it says "after 2 hours", so the time for both trains is 2 hours:

distance = rate * time

Train 1 r * 2

Train 2 (r + 12) * 2

Since distance = rate * time, the distance (or length of the arrow pointing straight west) for Train 1 is 2r. The distance (or length of the arrow pointing straight east) for Train 2 is 2(r + 12) which is 2r + 24. The distance between them (which is also the length of the whole entire arrow) is 232. Thus:

2r + 2r + 24 = 232 and

4r = 208 so

r = 52

This means that Train 1 is traveling 52 mph and Train 2 is traveling 12 miles per hour faster than that at 64 mph

Step-by-step explanation:

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3 years ago

1/9 of people in a class are left handed.

LenaWriter [7]

Answer:

left handed: right handed

1 : 8

Step-by-step explanation:

1 out of every 9 people are left handed

9-1 = 8

That means 8 of the 9 are right handed

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3 years ago