Simplify the expression.3x + 1 + 7x + 12
A. 10x + 13
B. 21x + 13
C. 20x
D. 10x
Answer: A
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Use an Euler diagram to determine whether the argument is valid or invalid.All painters use paint.All painters use brushes.Some people who use paint are teachers. Some painters are teachers.
A. Invalid B. Valid
Factor by grouping.20x6 - 25x3 - 16x3 + 20
A. (5x3 + 4)(4x3 + 5) B. (20x3 + 4)(x3 + 5) C. (5x3 - 4)(4x3 - 5) D. (5x6 - 4)(4x - 5)
Solve. Use ? = 3.14 and round your answer to the nearest hundredth.A manhole cover has a diameter of 24 in. What is the length of the brass grip-strip that encircles the rim of the cover making it easier to manage?
A. 37.68 in. B. 452.16 in. C. 75.36 in. D. 150.72 in.
Solve the inequality.
? 0
A. x < -7 or -7 < x ? 0 B. -7 < x ? 0 or x > 7 C. x < -7 or 0 ? x < 7 D. 0 ? x < 7 or x > 7