Find the principal square root of the number. Approximate the answer to the nearest hundredth whenever appropriate.
A. 4
B. 
C. - 4, 4
D. - 
, 
Answer: B
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Find 
and 
.f(x, y) = x3 - 7x2y + 2xy3
A. 
= 3x2 + 2xy + 2y3; 
= -7x2 + 3xy2
B. 
= 3x2 - 14xy + 2y3; 
= -7x2 + 6xy2
C. 
= x2 - 7xy + 2y3; 
= -7x2 + 2xy2
D. 
= 3x2; 
= -7x2 + 6xy2
The following table shows the earnings for the Juarez family last year. Solve the problem.MonthEarningsMonthEarningsJan.$1400July$1300Feb.$1150Aug.$2450Mar.$2950Sept.$2500Apr.$2300Oct.$2000May$1650Nov.$2350June$2700Dec.$2400What was the family's total income for the year?
A. $24,000 B. $22,000 C. $23,750 D. $25,150
Use the given information to find the exact value.cos A = - 
, 
< A < ?; sin B = - 
, ? < B < 
Find tan (A + B).
A. 
B. 
C. 
D. 
Find the axis of symmetry of the given function.f(x) = x2 - 4x + 14
A. x = 0 B. x = 10 C. x = 2 D. x = -2