Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, give the solution with y arbitrary. 4x + 3y = 1 2x + 4y = 8
A. {(-2, -3)}
B. {(-2, 3)}
C. ?
D. {(3, -2)}
Answer: B
Mathematics
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A. 70 B. 0.0007 C. 0.7 D. 0.07 E. 0.007
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At one high school, students can run the 100-yard dash in a mean of 15.2 seconds with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Rounding to the nearest tenth of a percent as necessary, find the percent of times that are:Between 17 and 17.9 seconds
A. 13.5% B. .5% C. 2.4% D. 16%
Mathematics
Solve the problem.Convert 90°C to Fahrenheit. Use the formula F = 
C + 32.
A. 194°F B. 219.6°F C. 168.4°F D. 81.5°F
Mathematics
Complete the factoring.30x9 = 6x( )
A. 5x B. 180x10 C. 5x8 D. 180x8
Mathematics