The currents in an electrical network are given by the solutions of the system
where I1, I2, and I3 are measured in amperes. Solve the system of equations using matrices.
A. no solution
B. I1 = 3, I2 = 3, I3 = 7
C. I1 = 5, I2 = 4, I3 = 9
D. I1 = 3, I2 = 3, I3 = 6
E. I1 = 5, I2 = 9, I3 = 4
Answer: C
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Solve.The gravitational attraction A between two masses varies inversely as the square of the distance between them. The force of attraction is 2.25 lb when the masses are 4 ft apart, what is the attraction when the masses are 6 ft apart?
A. 4 lb B. 1 lb C. 3 lb D. 2 lb
Calculate the current ratio and the acid-test ratio. Is the company healthy based on the guidelines given in the text?Current assets: $525,000Current liabilities: $182,000Liquid assets: $249,000
A. Current ratio = 2.11 which is fine Acid-test ratio = 1.37 which is too low B. Current ratio = 1.37 which is too low Acid-test ratio = 2.88 which is fine C. Current ratio = 2.88 which is fine Acid-test ratio = 2.11 which is fine D. Current ratio = 2.88 which is fine Acid-test ratio = 1.37 which is fine
Use the given information to find the exact value of the trigonometric expression.cos ? = 
; The terminal side of ? lies in Quadrant IV.
Find sin 2?.
A. - 
B. 
C. 
D. - 
Write the slope-intercept form of the equation for the line passing through the given pair of points.y-intercept -10 and x-intercept -9
A. y = 
x - 10
B. y = 
x - 9
C. y = - 
x - 9
D. y = - 
x - 10