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zloy xaker [14]
3 years ago
11

Answer it and show your work. Which letter choice is it.

Mathematics
1 answer:
ivanzaharov [21]3 years ago
7 0

Answer:

b = 55 degrees

Step-by-step explanation:

The angles 30, a, b and 45 must sum up to 180 degrees

Subtracting (30 + 45) from both sides leaves us with a + b = 105 degrees.

But b = a + 5.  Substituting a + 5 in the equation above yields

a + a + 5 = 105 degrees, so that

2a = 100 degrees, and a = 50 degrees.  Then b = a + 5, or b = 55 degrees.

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-40=-8(x+2) solve the equation
raketka [301]

Answer:

x = 3

Step-by-step explanation:

-40 = -8 (x + 2)

-8 (x + 2) = -40   --- divide both sides by - 8

-8 (x + 2)           -40

--------------   =   ----------

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Let x represent the number of miles and y represent the total cost

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Use substitution method to solve for x:

0.75x + 49.95 = 0.50x + 59.95

0.25x + 49.95 =              59.95         <em>subtracted 0.50x from both sides</em>

0.25x               =              10.00          <em>subtracted 49.95 from both sides</em>

                   x   =    40                        <em>divided 0.25 from both sides</em>            

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