A number y
is rounded to 1 decimal place.
The result is 5.4.
Write the error interval for
y
in the form
a≤ y< b.

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

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