Factor by grouping.14m3 - 7m2n2 - 2mn + n3
A. (7m - n)(2m2 - n2)
B. (7m2 - n)(2m - n2)
C. (7m2 + n)(2m - n2)
D. (7m2 - n)(2m + n2)
Answer: B
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A. $6,000,000,000 B. $300,000,000 C. $60,000,000 D. $120,000,000
Solve the problem.A force of 136 lb acts in the direction N 45° E. Find its east and north components.
A. 68
east; 68
north
B. 68 east; 68
north
C. 68 east; 68 north
D. 68
east; 68 north
Simplify.66 - (24 - 7)
A. 35 B. 49 C. 17 D. 42
Solve the problem.Jim has gotten scores of 87 and 85 on his first two tests. What score must he get on his third test to keep an average of 80 or better?
A. at least 86 B. at least 68 C. at least 84 D. at least 66