Use Gaussian elimination or Gauss-Jordan elimination to solve the problem.A company makes 3 types of cable. Cable A requires 3 black, 3 white, and 2 red wires. B requires 1 black, 2 white, and 1 red. C requires 2 black, 1 white, and 2 red. They used 95 black, 100 white and 80 red wires. How many of each cable were made?
A. 15 cable A
16 cable B
15 cable C
B. 15 cable A
20 cable B
15 cable C
C. 48 cable A
20 cable B
12 cable C
D. 20 cable A
15 cable B
15 cable C
Answer: B
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Solve. If necessary, round percents to the nearest tenth, dollar amounts to the nearest cent, and all other numbers to the nearest whole.The marketing division of a company predicts that 78% of the 450 special promotional sale items will sell on the first day of sale. What percent of the promotional items should be available after the first day of sale? How many special promotional items should be available after the first day of sale?
A. 78%; 351 items B. 22%; 99 items C. 22%; 351 items D. 78%; 99 items
Graph the piecewise linear function.f(x) = 
A. 
B. 
C. 
D. 
Find the average rate of change for the function over the given interval.y = -3x2 - x between x = 5 and x = 6
A. -34
B. - 
C. 
D. -2
Find the proportion of observations of a standard normal distribution that are between the given z-scores.1.26 and 2.15
A. 0.0862 B. 0.0881 C. 0.0898 D. 0.5880