Remove the parentheses and simplify, if possible.(8z - 1) + (z2 - z + 7)
A. 8z - 8
B. z2 + 7z - 8
C. 8z + 6
D. z2 + 7z + 6
Answer: D
Mathematics
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Solve the problem.A 12-foot ladder is leaning against a house with the base of the ladder 3 feet from the house. How high up the house does the ladder reach? Round to the nearest tenth of a foot when appropriate. 
A. 10.9 ft B. 11.6 ft C. 12.4 ft D. 9 ft
Mathematics
Fill in the blank.
angle has a measure of 90°.
A. A straight B. An acute C. A right D. An obtuse
Mathematics
Combine into a single logarithm. In 2 + In(x+1) - [In(4x+7)]/3
What will be an ideal response?
Mathematics
Simplify.13 ? 17 + 4 ? 3
A. 819 B. 233 C. 377 D. 675
Mathematics