Find the specified extreme value on the given region.
Minimum of 7x + 3y
A. 36
B. 24
C. 16
D. 0
Answer: C
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Find v ? u.v = 5i - 3j and u = -8i - 7j
A. -3i - 10j B. -40i + 21j C. -61 D. -19
Solve the problem.In a parallel electrical circuit, the impedance Z can be calculated using the equation 
= 
where Z1 and Z2 are the impedances for the branches of the circuit. The phase angle measures the phase difference between the voltage and the current in an electrical circuit. If the impedance Z is expressed in the form 
, ? can be determined by the equation tan 
style="vertical-align: -4.0px;" />. Determine the phase angle ? (in degrees) for a parallel circuit in which 
and 
A. 30°
B. 45°
C. 0°
D. 60°
Find the circumference and area of a circle having the given diameter or radius. Use 3.14 for ?. Round your results to the nearest tenth.d = 40 cm
A. 62.8 cm; 5024 cm2 B. 125.6 cm; 125.6 cm2 C. 62.8 cm; 251.2 cm2 D. 125.6 cm; 1256 cm2
Simplify the expression.
?
Fill in the blank(s) with the appropriate word(s).