An expression that occurs in calculus is given. Factor completely.(2x + 1)2 + 3(2x + 1) - 4
A. 2x(2x + 1)
B. 2x - 1
C. 2x - 6
D. 2x(2x + 5)
Answer: D
Mathematics
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Write the English phrase as an algebraic expression. Let x represent the number. Simplify the expression, if possible.Three times a number decreased by 7
A. 
B. 3x - 7
C. 3 - 7x
D. 3x + 7
Mathematics
Write in exponential form.7 ? 7 ? 7 ? 7 ? 7 ? 7
A. 7 ? 6 B. 76 C. 67 D. 42
Mathematics
Solve the problem. Round to one decimal place if needed.If a tree 42.5 feet tall casts a shadow that is 17 feet long, find the height of a tree casting a shadow that is 9 feet long.
A. 34.5 ft B. 80.3 ft C. 3.6 ft D. 22.5 ft
Mathematics
Solve the equation.log20 (x2 - x) = 1
A. {-4, 5} B. {-4, -5} C. {4, 5} D. {1, 20}
Mathematics