Use the properties of parallel lines to solve the problem.In the figure, 
. m(?ABC) = 50°. Given this information, find the measures of as many other angles as possible.
A. m(?ADE) = 50°, m(?DBC) = m(?ECB) = 130°
B. m(?ADE) = 50°, m(?DBC) = 130°
C. m(?ADE) = m(?ACB) = m(?AED) = 50°
D. m(?ADE) = m(?ACB) = m(?AED) = 50°, m(?DBC) = m(?ECB) = 130°
Answer: B
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?a = 7
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Do the problem mentally using the distributive property.
?
?
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A. 16 B. -16 C. 2 D. -8
Factor the polynomial by removing the common monomial factor. 9x - 63
A. 9(x + 7) B. 9(x - 7) C. 9(7x - 1) D. 9(x - 1)