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SSSSS [86.1K]
3 years ago
10

Show your work please

Mathematics
1 answer:
gogolik [260]3 years ago
7 0
45-65-52.75+22-7.5+94=35.75
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Use the given information to write an equation and solve the problem.<br> (28-31 in the picture)
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Answer:

28. 120 degrees

29. 30 degrees

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31. 72 degrees, 108 degrees, and 18 degrees

Step-by-step explanation:

We assign variable x for the answer we are looking for (28-29).

28.

Supplement means x + y = 180 degrees. We also know x = 2y. Substitution gives us 3y = 180 degrees, so y = 60 degrees and x = 120 degrees.

29.

Complement means x + y = 90 degrees. We are given 2x = y. Substitution brings us 3x = 90 degrees, x = 30 degrees.

30.

Supplement means x + y = 180 degrees. We are told that y = 2x + 12, so we substitute. This gives 3x + 12 = 180 degrees, x = 56 degrees. Substituting that back into the equation for y, we get 124 degrees.

31.

Supplement means x + y = 180 degrees. Complement means x + z = 90 degrees.  Using our given info, we know y = 6z. We can substitute that in to get x + 6z = 180. Subtracting our second and third equations, we get 5z = 90, z = 18 degrees.  Therefore, x = 72 degrees, y = 108 degrees.

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Which of the following has the least steep graph?
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the answer for this question is ( d)

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     80 mi

t = ----------- = 26 2/3 minutes

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4 years ago
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