To solve this system using a matrix equation, which of the following matrices would be multiplied by the column matrix of the constants to solve for the variables?
?
? ?
A. ?
B. 
C. 
D. 
E. 
Answer: C
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Write in expanded form using powers of 10.85,508
A. 8 × 104 + 5 × 103 + 5 × 102 + 8 × 10 B. 8 × 104 + 5 × 103 + 5 × 102 + 8 × 1 C. 8 × 104 × 5 × 103 × 5 × 102 × 8 × 1 D. 8 × 105 + 5 × 104 + 5 × 103 + 8 × 10
Solve the problem.The pressure of a gas varies jointly as the amount of the gas (measured in moles) and the temperature and inversely as the volume of the gas. If the pressure is 
(kiloPascals) when the number of moles is 4, the temperature is 
, and the volume is 
, find the pressure when the number of moles is 6, the temperature is 
, and the
volume is 
.
A. 1215
B. 2250
C. 2340
D. 1170
Find the area of the geometric figure.Trapezoid
A. 246.4 sq yd B. 308 sq yd C. 492.8 sq yd D. 184.8 sq yd
Solve the problem.Evaluate (f + g)(2) given f(x) = x - 3 and g(x) = x - 7.
A. 14 B. -6 C. 8 D. 0