Find v ? u.v = -8i + 7j and u = 2i + 2j
A. -16i + 14j
B. -2
C. -30
D. -6i + 9j
Answer: B
Mathematics
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Solve the equation.log (4x) = log 5 + log (x - 1)
A. 
B. 
C. {5}
D. {- 5}
Mathematics
Simplify.(x - x2 + 5) + (3 - 5x2 + x3)
A. x3 - 6x2 + x + 8 B. x3 + 6x2 + x + 8 C. x3 - 6x2 + 8x D. x3 - 4x2 + x - 8
Mathematics
Solve the problem by using addition, subtraction, multiplication, or division as needed.Raisa's car used 16 gallons of gasoline when she drove it 224 miles. How many miles per gallon did it get?
A. 16 miles per gallon B. 14 miles per gallon C. 208 miles per gallon D. 23 miles per gallon
Mathematics
Solve the problem.Suppose that a family has 5 children and that the probability of having a girl is 
. What is the probability of having no more than three boys?
A. 0.5000 B. 0.3125 C. 0.8125 D. 0.9688
Mathematics