Obtain an equivalent system by performing the stated elementary operation on the system.Multiply the third equation by 1/5.4x - y + 5z + w = -105x - z + 4w = 45x + 20y + 4z - w = 30 x + 3y - 8z = 1
A. 4x - y + 5z + w = -10
5x - z + 4w = 4
x + 20y + 4z - w = 30
x + 3y - 8z = 1
B. 4x - y + 5z + w = -10
5x - z + 4w = 4
x + 4y + 
z - 
w = 30
x + 3y - 8z = 1
C. 4x - y + 5z + w = -10
5x - z + 4w = 4
x + 4y + 
z - 
w = 6
x + 3y - 8z = 1
D. 4x - y + 5z + w = -10
5x - z + 4w = 4
x + 4y + 
z + 
w = 30
x + 3y - 8z = 1
Answer: C
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Find the amount received by the seller of the given stock assuming a commission of $7.95.1100 shares at $15.50
A. $17,057.95 B. $14,910.80 C. $17,042.05 D. $17,050.00
Solve by substitution and check.x + y = 9 y = 2x + 3
A. (7, 2) B. (2, 7) C. (3, 6) D. (1, 9)
Solve the system of equations by elimination.
A. x = -10, y = 3; (-10, 3) B. x = -3, y = 10; (-3, 10) C. x = 10, y = -3; (10, -3) D. x = 3, y = -10; (3, -10)
Solve the problem, rounding the answer as appropriate. Assume that "pure dominant" describes one who has two dominant genes for a given trait; "pure recessive" describes one who has two recessive genes for a given trait; and "hybrid" describes one who has one of each.In a population, 30% of females are pure dominant, 60% are hybrid, and 10% are pure recessive. If a pure recessive male mates with a random female and their first offspring has the dominant trait, what is the probability that the female is pure dominant?
A. 0.75 B. 0.30 C. 0.20 D. 0.33