Follow the steps and finish the solution.
7(x-3) = 28
distributive property
7x-21 = 28
addition property of equality
7x = 49
division property of equality
x
=
what is the value of x?
07
o 42
o 56
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Which expression is equivalent to sq-80

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.

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585