Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Answer: A
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Find the coordinates of the vertices and foci of the ellipse.y2 = 4(1 - x2)
A. V(-4, 0), V(4, 0), F(-3, 0), F(3, 0)
B. V(-2, 0), V(2, 0), F
, F
C. V(0, -2), V(0, 2), F
, F
D. V(0, -4), V(0, 4), F(0, -3), F(0, 3)
Find the mean. If necessary, round to one decimal place.16, 11, 6, 13, 5, 3, 6
A. 8.1 B. 10 C. 10.1 D. 8.6
Allocate overhead as indicated. Round to the nearest dollar.ProductNumber Produced Average Sale PriceA120? $19B270? $25C210? $20D220? $22Overhead: $25,479
A. $1368 to A $8438 to B $3150 to C $7260 to D B. $3215 to A $9518 to B $5922 to C $6824 to D C. $6750 to A $2280 to B $4840 to C $4200 to D D. $2280 to A $6750 to B $4200 to C $4840 to D
Solve the problem.Frank can type a report in 3 hours and James takes 5 hours. How long will it take the two of them typing together?
A. 
hr
B. 
hr
C. 
hr
D. 5 hr